Best debuffers for Aether offense and defense

I was very impressed with Aversa on both offense and defense last season. I can’t wait for more copies of her to become available via heroic grails.

What other debuffers have you had great mileage out of in arena?
Arvis seems like he might be really good on offense, given the ability to place him in any column on the map for positioning.

Chill skills seem really good, too (including Soren, Lilina prf effects).

From Arena Offense, I’ve mostly been using cheerleader marth for invisible buffs, but this is a different game made.

Which debuffs have been effective for you?