what about standard? Would that be a good difficulty to run?

standard works fine from what ive seen

harder instakills and higher boss hp + more factors that i forgot lol

ahh yeah i actually noticed the higher boss hp when doing 1-4 runs

how come brutal is barely used, do the enemy changes make runs more inconvenient/slower

i havent really been here for a while, i just got back into posting ultrakill runs today

im pretty sure it can be any difficulty, though for most speedruns recommended is violent or brutal since enemies move faster on those difficulties, some speedruns require harmless tho due to the extra hp

just play whatever difficulty works well for you