I think it is stupid how skulls automatically turn on to increase difficulty, i mean i see it game play wise, but what if i don't want to fight the covenant without a reticule, or having to melee to restore health, stupid stuff like that. it seems like they could just increase the difficulty/strength of stuff. i mean, no four man squad could beat 25 brute cheiftains, supported by jackal snipers, on legendary. no dumb skull needed. of course all of the skulls could be optional, could then be something similar to the campaign's "mythic" difficulty. but i think they should be optional, i think it would be funner.