We recently just got Apollo on DMM who also seems OP.

Ability 1: Applies Regen + cures 2 afflictions for all allies (lasts 4T, CD 6T)
Ability 2: Damage cut of all allies 50% (6T CD)
Ability 3: Fire DMG to enemies, "Flame Tie" x3 to enemy

Assist: Always cuts DMG of DoT debuffs (Poisoned, Corrupted, Scorched and Drowning) by 50% to all allies

Burst: Reduces the CD of Ability 1

... can't forget about Fire Amon either.
My current team is Haru, Uriel, Frey, Prometheus
Wish I had Apollo instead of Prometheus
FAmon instead of Uriel too. Since everyone does around the same burst as Uriel anyway once it reaches the cap. (iirc?)

But yes, for a super fast burst build, Haru/Frey/Uriel/Svarog seem perfect.