If you'd like some reasons as to why 31s shouldn't run hard crota's end, here are a couple pertaining to the crota fight. 1. If you thought they'd at least be useful for boomers you're wrong, boomers now have yellow health bars and take level 32s 4+ headshots with snipers to kill. 2. There is no chalice, which means not only will they take more damage, they will have a harder time regaining health.