Question - Final Fugue and Heroes are Forged achievements (2 Viewers)

[Micro_Mega_Mini]

I've been working on the two missions, Final Fugue and Heroes are Forged's achievements and could use some assistance/advice. For Final Fugue, at the beginning of the fight, there are two caster mobs: A rallosian warlock and hexmaster that aren't immediately targetable, but even once they are, I cannot target them unless I turn off RGmercs, and my boxes won't assist on them. I thought forced target would help, but they don't show up there, even if I try targetting manually. What setting(s) would I need to use to target them and have my boxes assist? On the boss fight, there is a area blindness attack that happens that I need to move out of for the achievement. What would be the quickest way to get everyone to disengage and follow the MA out?

For heros are forged, how do you target and kill the egg sacs? I've read that this has to be done with pets, but I cant target them at all, even with a manual /target command.