Warmode is when you reset your skills to prioritize combat skills over economic skills.
This increases your damage in combat, but stops improving your economy.
The idea of this guide is to show you how to enter Sustainable Warmode without becoming a hostage to losses.
To be sustainable, the basis is simple: spend less money than you earn.
This may seem obvious, but if this rule is not followed, sooner or later you will end up having to go back to the economy build.
It's always good to have an emergency fund in case your expenses exceed your earnings for a while, but, to avoid scares, the ideal is to keep your income positive.
Work, entrepreneurship and workers
There's no secret here. Unlike the economic mode, these sources of income will be much lower. Work and entrepreneurship will generate a maximum of 10 BTC per day, each. Workers depend heavily on wages, taxes and the product produced, but it remains a challenge to make a profit.
Missions
Weekly, through missions, you receive 100 BTC and 10 crates.
If the crates are sold, you can get around 130 to 135 BTC per week in total.
Companies
The number of businesses you have will likely be one of your biggest sources of income. Passively, they produce resources that can be sold on the market or even consumed by you.
A rule of thumb is to expect a gain of 3 BTC daily per company level.
So, a level 5 company will generate around 15 BTC per day.
That is why it is very important to form a base of well-evolved companies before venturing into sustainable Warmode.
There is no single answer here. But, after testing the simulator a lot (we'll talk about it later), in the current situation of the game, the ideal way to maximize damage in Sustainable Warmode is to have something between 6 and 8 companies.
This varies because equipment costs in the market fluctuate. The more companies, the more points in economic skills will be required for them to be active, and the fewer skill points will be available for combat skills.
Note: there are players who can sustain themselves without having so many active companies. They are able to support their military spending with other sources of income. We will talk later.
The bigger the better (there he is).
Through tests comparing all level 5, level 6 and level 7 companies, the increase in damage is around 8 and 10% for each additional level in companies. Although the higher levels come at a high cost, in the long run, upgrading the engine is worth it.
As you attack (and you will attack a lot) you will eventually get some boxes.
To have a more consistent income, selling the boxes is safer. But, if you want a little excitement, opening the boxes can give you a bigger gain or a big loss.
Note that there is a combat skill associated with this source of income. At high levels this ability becomes very useful for a Sustainable War build.
As your equipment and weapons are destroyed, you receive scrap.
The value of the scrap received is around 20% to 25% of the value of the used equipment. So, an item you paid for 50 BTC will generate roughly 12 BTC of scrap.
Just like boxes, selling is a way to receive a more guaranteed value. But you can also make equipment to use or sell.
It is not within the scope of this guide to define what is best to do with your scrap, but I believe this depends on the value of the scrap, steel and equipment on the market.
As battles unfold, countries place rewards to encourage players to fight on their side.

The top number next to the coin shows the money reserve that the country has set aside.
The bottom one shows how much the player who deals 1k damage will receive.
So, the more powerful your attacks, the more money you will receive as a reward. Note that each side of the fight can place a different value for each 1k of damage.
These rewards allow players to use more expensive builds without taking a loss.

Lamine's tip: be careful, as there is a cooldown as soon as the country puts money into this reserve. If you want to get the reward, wait for the cooldown to pass.
Spoils of War
As the battle rages, rewards are distributed to players who deal the most damage.

In each round of combat, for every 200k damage caused by both sides, an elite box is opened and its item is added to the spoils of war.
An icon next to the damage dealt by the player indicates what their reward is. The more damage, the more valuable the item you receive (at least it should be like that, because I've seen some weird things).
In addition to the round rewards, there are also rewards for the battle as a whole. The difference is that the ranking will take into account the total combat damage and a box is opened for every 500k total damage.
At higher levels these rewards are very worthwhile. Note in the example the items that players with the most damage will receive.
Lamine's Tip: fights with a lot of damage distribute good rewards without the need for a large amount of damage. Even if you're in eco, you can pick up some cool items to sell or use.

When entering a battle, right at the top, you can notice the mercenary contracts (this icon of a paper with a marker). Click to see available contracts (highlighted in red).

In this agreement, on one side we have the country demanding a certain amount of damage, and on the other, the Military Unit receiving more money for the damage given when fulfilling this contract.
In the example we have:
The expected damage under this contract is 1.5M.
Every 1k damage will receive 0.09 BTC.
And the total payout is 134.55 BTC.
The timer is the bidding time in the auction for any Military Unit to apply to fulfill this contract.
Note that, in this example, the Military Unit “Ultima Ratio” will keep the contract, as it offered to cause 1.5M damage for 0.09/K, while “Tercio de la Dama” lost the auction, as it asked for more money for the same amount of damage.

In this other example, we can see that after the contract is finalized, the money is distributed according to the damages of its players. The value of the deposit is the guarantee that the Military Unit will fulfill the contract. If UM fails, the deposit remains with the country that made the contract. If UM complies, the deposit is returned to UM's cashier.
On the website https://intel.warera.wiki/builder you can test builds to find the ideal build so you don't suffer losses.
The simplest way to use the simulator is to select your character using the button in the top right corner “IMPORT PLAYER”. This way, your parameters will already be chosen automatically.

Once selected, you can reset your combat skills so that the simulator tests the best combination for you. Just click on the semicircle icon with an arrow.

You can also define whether or not you want to use a specific weapon or equipment. As it's a simulator, you can play around and test different combinations (I bet you've already wondered how much damage you would do if you were using a jet). Otherwise, you can leave all options marked as “ANY” and the simulator will test different combinations for you.
Click the “Optimize Damage” button for the simulator to work its magic.
After loading, it will show several item options and the estimated daily damage. Let's look at some examples just to understand better.

In this first case, this build is sustainable. Note that, in yellow, the daily cost is negative, that is, you will spend less than you earn.
There it is described in red how much approximately you will spend on equipment and consumables, and in green, your sources of income. For each item, in addition to the tier, the simulator also chooses an ideal attribute value.
The numbers below the consumables show how much of each item will be used throughout the day. And the percentage below for equipment and weapons reflects the expected wear and tear throughout combat. If the value is greater than 100%, it means that more than one item will be consumed throughout the day.
Why does the weapon consume more than other equipment? Every time you attack, the weapon loses 1% in its durability. Equipment does not lose durability if you dodge when making an attack.

Lamine Tip: It is also possible to see the cost that the simulator used to buy this item. Sometimes it is possible to find good opportunities on the market and buy better items with the same budget.

Unlike the first build, here the damage has increased, but so has the cost.
In this case, there is a daily cost of approximately 34 BTC and a cost of 0.09 BTC/K.
This second value is very important, because if you get a combat reward or mercenary contract that pays this value, this build will also be a sustainable build.
In other words, it is possible to use better equipment, cause more damage and still not suffer losses.

Here it becomes more difficult to be sustainable, as it requires a reward of 0.35 BTC/K to be sustainable.
It's not impossible, but it's much more difficult to achieve. For Sustainable Warmode, this type of build is not recommended.
With more skill points and a higher rank, your damage will naturally be greater.
By way of comparison, a level 40 character, with 25% rank bonus, can, with the same equipment as the third example, cause much more damage and still be sustainable.

Note that the chance of loot and combat rewards make this build sustainable. Higher level characters even give up factories and can stay in Sustainable Warmode with just that. It's a little riskier, but it's still a very viable strategy. As I don't have much experience with being a high level, I'll leave it to an advanced guide.
Be patient and strengthen your economy in the beginning.
Over time, you will increase your rank, level up and deal more damage. Then you will get better rewards in combat and be more relevant to your country and your allies.
Sustainable Warmode is not about hitting everything head on. It's about hitting hard, spending smart and staying financially alive after the war.