Eldritch's Fire is probably most unoptimized spell for computer performance

Grim Dawn General Discussion
1

Attach COF to it and use COF on at least 20 enemy (Arkovian City Outside) then watch the decrease of fps (have oced gtx 1060 6gb and i7 ). Old computer had lagfest though.

Probably due to it being red “smoke” and smoke is always costly but still it shouldnt be like this.

2

My system is worse (much worse) than your however i don’t have any performance problem with eldritch’s fire.