Thought I would give an update on my all-mage team with summoning - all my characters have summoning level 10 through gear + levels, and most are at level 4 (some at 5 with gear) for their primary skill (hydro / aero / geomancer / necromancer)
Everyone has fortify, armor of frost & teleport. Primary weapons are utilized very little.
It’s been largely a cakewalk.
For example - I went after Alexander in the Elf Tree instead of battling him later. Previously, when I’m leaving the academy where the fireballs come, it was a really, really long fight. This time it was over in 10 minutes.
I think this is a flaw in the game where you believe all the things are equal, but summoning is just so powerful - you only waste one turn spawning an incarnate, and then you get to do something new from then on until you finish, so you get to cast more spells / totems / teleport for example. Whereas on my first playthrough I did a 2H warrior, and I was playing with my son who was doing summoning and it always pissed me off I would only do a fraction of the damage his incarnates would do.
I do a fair amount of keeping my armor up and the group is always together to better utilize some of the mass heals, in hindsight if I would have had Irfan and his dome of protection, I’d be even more potent.
I did hit a weird bug though - was finishing up at the academy after battling my dopplegangers, and the battle wouldn’t stop - the fireballs continued to rain down even though my entire party was back at the boat, so had to revert to a save (fortunately for me I had one near the end of the battle) and replay the ending again.