Anyway, I don't mind taking repair costs all the way down to 4% (slightly better than engie Is got before the fix) if that's what it takes, because my intent wasn't to make repairing more expensive but rather to fix a problem where microing to make sure that only engie IIIs repaired anything remotely expensive (let alone golems, where it was a night-and-day difference) was highly desirable. But I'm just not sure that 4% is a proportional response in light of how much the energy changes in 5.040 helped econ.
For the most part I don't think people CARED what the Mk3 repaired first, with the exception of Large Constructions.
That is, I used my Mk3s to repair:
Golems (Mk2s would aid, but would be the first things pulled off)
Zenith Power Generators
[Any other Z-Trader buildings]
It wasn't so much due to micro
, but the fact that I got the structures cheaper if they were aided, so I'd throw my highest level engineers at the problem.
When I wasn't actively building/repairing these structures, I didn't bother separating out engineers. The cost:benefit ratio was too small.