The common talk on Killhare is “WOW! must have!”
The common talk on Quintus is “Why do I need another Horghall…?! meh…”
Here is the 7DD grading (condensed):
But isn’t Quintus with Costume Bonus is similar to Killhare?
Killhare: max special attack = 2222, tiles to special = 10, lowers all team defense by -20%, and has better defense (756)
Qunitus CB: max special attack = 2116, tiles to special = 11.4, no down effect, lower defense (667) but also a slighly higher attack state.
Now, I agree Killhare is better. No doubt, speed matters much.
I also agree her debuff has a positive side of not being able to apply a lower rate. That’s good for raid defense teams.
But if Killhare is graded A+, wouldn’t you agree Qunitus CB deserves an “A” Grade?
On quests, and challenges - you can pump him mana pots - so slowness is less of a problem.
He is better than Killhare for titans.
He is just a step down from her, but just a single step.