Abyssal A & A: AAAAAAAAAAAAAAA (Emblem Ike Solo)

(fast moving image warning from 6:46 - 7:09)
Ike simply cannot attack Ayra unless she's below 25% HP, as his "you go first" gimmick backfires spectacularly
the task is then to chip away at her using Great Aether when she's in the AoE
And then there's Athos, who has to be away from any allies to lessen his fury. Not only that, one must be wary of not only his Discord B skill, but also his Ploy C skill that provide [Penalty] effects which add to Beyond Reason - which means you have to be VERY careful of where your other units stay so they aren't in the wrong columns.