They make hm crota MUCH easier. hardest time I ever had was 3 hunters 2 warlock and 1 titan (me). Did it last night with 3 titans 2 hunters and 1 lock and it was super ez, ruin wings for the heavy, bubbles to agro boomers, and to sheild entry and exit from crystal room and at the beginning. Striker could use some buffs but it is a ton of fun with helm of inmost light. Also easiest run I ever had was 5 titans and 1 hunter crota was dead on the 2nd sword haha