Can't figure out how to regroup my party. I used the pyramids to group up two character but then I got stuck behind locked doors without my thief. I can't solo those large bug voidkin bugs at level 11 (even though I've been thieving 4x everything and my team has great gear)

Any tips would be helpful. Going to try and put the pyramid on my Thief and see if I can lockpick the doors.

I feel like I'm missing something because this seems like a strong progression blocker.