If Luke casts "Animus Lv3" (one ally plays 2x per turn) on Kraken and then uses the "Charge Lv3" (select 1 ally to attack 2x) on Kraken, Kraken then hits 4x for sizable DMG (like 1000's of DMG so pick a big guy to attack).
I don't know if this works at lower levels, because I wasn't paying attention then.