First of all, we need to clarify the mathematics of energy vs. entrepreneurship. Namely, if for 1 level of entrepreneurship we get 5 points, and for 1 level of energy we get 10 points, is energy twice as strong? Well, not really.
The disadvantage of entrepreneurship, besides getting half as many points, is that there is no fidelity for selfwork.
But there is another part of the story. We need to take into account the current state of the market, the average price per/pp, and your average salary.
If we take into account that the current average price per/pp=0.08, this means that your salary should be 0.128 for the ratio to be 1:2. Most of us do not have a salary of 0.128, but less, which gives greater importance to entrepreneurship.
Where do 0.08, 0.128 and all these numbers come from? Well, simply put, most, if not all, have an iron/limestone factory, which are at +60% bonus, 0.08 x 1.6= 0.128.
Therefore, when building eco skills, for me there are two optimal scenarios:
entrepreneurship : energy : production
1 : 2 : 2
3 : 5 : 5
When and which ratio to choose?
If your salary (net) is 0.128 or higher, you go for 1:2:2.
If you work for someone for the minimum wage, and they do the same with you, you go for 1:2:2 (provided that you both play optimally, this is how you will maximize profit)
If your salary is less than 0.128 (net) you go for 3:5:5.
You always raise production first, but never two levels above. If you are not sure what goes next, consider that entrepreneurship should never be higher than 60%, i.e. a ratio of 3:5.
TLDR
The order in which I would build (3:5:5, because few fall into the first two categories)
P = production, E = energy, S = selfwork/entrepreunership
P1
E1
P2
E2
S1
P3
E3
P4
E4
S2
P5
E5
S3
P6
E6
P7
E7
S4
...
You insert levels for new companies as needed.