My team is starting to really shine. Glad I stuck with Bretto/Knolan/Alumon. Prolly still doesn't compare to having Garrison/X/X, but I love it.
Arcane Storm and one of the 25ish weapons for Knolan helps a lot. Staff gives +10% AP in combat (which he has about 3200 for me right now). Arcane Storm hits consistently hard and sets up chill, ignite, AND arcane sickness. That leaves you open for so many options if you have characters that synergize with debuffs (of which Alumon does). It sets up Knolan's Arcane Explosion. Leaving any mob, including bosses (unless they can't be) stunned.
I also got crit ignite ticks which makes dealing with packs a lot easier as he can just spam Fire Storm and they just die to burn.
Knolan also has the best ressurection of the 3 in my group. 65% revive with no quirks, perfect.
Alumon is basically there to keep Knolan from getting hit. Devastation II (taunt perk) coupled with the decreased damage while casting perk works well. He gets targeted, gets hit, but survives anything (my Alumon has like 6k HP?). Then one shots most things with the final burst if he gets hit with anything significant. He's also a superb backup healer. Extremely strong single target and AOE heals.
Last good ole Calibretto. Most people here are using so not much to say, he keeps everyone alive, but also is my main Battle Burst user. Level 1 and 3 are great. 2 is great for working with Knolan's fire.
I also LOVE Time Warp, it's a great oh shit button and a great RAISE HELL button.
EDIT: I forgot about all buffs as well. Knolan has a 25%(?) attack, haste, and crit buff (or something like that) that lasts two turns. Alumon has 30% haste for 3 turns, and an attack buff if he cures a debuff.
TLDR: Calibretto, Knolan, and Alumon take a while to get going, but once they do, they do.