I had a thought to what would make a great Kun Lai Runt destroyer:Rapana Whelk
A breed 5 of this snail have 260 speed, which will outspeed a breed 4 Kun Lai runt which most use. And most important at all, it have an undead attack in Absorb. Which will do extra damage and help keeping you alive. And critters takes less damage from elemental attacks and ignore the stun.
Enough of these snails appearing and the Kun Lai Runt should be forced out of the meta imo.