As above, I'd rather have my own custom slann, but out of the two I'd rather have Kroaky I think. IMHO sticking a character as expensive as Lord Maz on a steg and shoving him out on his own is asking him to be cannoned, bolted or obliterated in some other equally spectacular fashion. Kroak's immovable TG anvil will always come in useful, no matter how much it costs.