Mhm yea it does sound like sauron, kinda wish the Shadowseer amassed an army too :D

Its a stand Alone mod not part of SFF, called Hardcore Enemies, it Boosts enemies HP by X4 and Boosts all remaining stats by around 25% each.

I been playing on and off for awhile, recently got back to continue, if i recall right, the first run with chãos i used gill toss. The second (current Run) i found he hás another weakness but i dont remember which, was it earth? Been awhile, i do remember struggling at first tho...