I like the idea of Chevalier being size 2 , since they were the strongest size one enemies, but adding one action makes him just as devastating, if not even more than he was before, this pretty much identical to having 2 chevaliers, i suggest making him much more harder to stun(Probably +30% on champion and +20% on veteran) since it is the best way to counter them in vanilla game, and remove or reduce accuracy debuff for the subterranean skewer.I think this could compensate 1 turn, and make make them much less annoying and broken, and more in par with other size 2 enemies.