I mean... spider mounts instead of overwhelm if you want to be OP (otherwise, that one that mitigates casualties is pretty good). But then you don't need barbarian since the scouts are plenty good until you summon your many booked archer options. Actually, as nice as fury is, the T1 Materium archers are pretty powerful, too.
Tome of the Horde for sure, though. That 20% damage boost for everything is worth the increased fragility (and doubly so for ranged). Even more valuable than lightning arrows (but feel free to take those if you want. I'm recently sold on Vine Prison being a game-breaker especially for archers, though. Which means my last game I just ignored Tome of Enchantment and didn't miss it one bit. And let's be honest, everything in Horde is great to the lategame.
I actually like Wizard King, perhaps because I didn't pick runesmith, instead going for lower upkeep.