So my first run in tier 4 ug first phase was a breeze even with 44% armor metigation but the second phase we ran into a group of medics and shields, seems doable not to bad, start pumpin clips in him then I realize his freakin SHIELD was recharging faster then we could damage him and up to this point all npc no shields were done in about a clip. Is the shield even soppose to recharge it seemed impossible had to bust a box and pull them out of their healthbox not sure if this is intentional or a problem that needs to be looked into.