[kianduatha]

I do admit that the Fomorian Giants themselves getting darkvision 50 or so would make a lot of sense(it's apparently pretty dark in Fomoria, what with all the black dogs and stuff running around with darkpower). But I think most of your other changes hinge on Fomoria being weak at research. And for that, the easiest change is simply to make Fomorian Druids cheaper by 10 or 15 gold.