There are no diminishing returns on Grid Power, so feel free to build whatever types of generators you want to provide it for you.

Note that the individual generators have been balanced differently than normal, so take that into account before building 16 Watermills.

Seems like diminishing returns is still in effect...would it be possible to update quest to reflect this?
Tested with 8x water mills 106.67/128=83% efficiency.

We're missing this mod
https://www.curseforge.com/minecraft/mc-mods/too-many-efficiency-losses

If XU2 generators were intended to have no efficiency loss in this pack, then yes, adding the mentioned mod is a good idea.

It is also tweakable, so that rather than removing the efficiency loss, it could be changed such that the penalty is less bad.

While it seems that Damien originally intended to remove XU2 DR, he ultimately did not. The dragon egg mill in particular is extremely powerful, and nobody would use anything else if they could get away with it.

However, I think the DR curve may be a bit too much as it stands, and we could probably relax them a bit. Neeve will update the quest book accordingly, and I will look into the prospect of adding the mod and adjusting configs for balance.

Resolved by #272 (insofar as quest description is concerned; TMEL is still under consideration)