Friend of the Dork
First Post
As far as the Wolverines go, they seem pretty boss-awesome to me.
3 attacks at base +4, +2 for augment summoning, +2 for bardic performance, +2 for flanking bonii, so that's 3 +10s, at 4 wolverines. Even against an AC 23 bbeg, they've got pretty good chances. Add in an alignment template for extra smite damage (for this case, Entropic or Celestial), and he's golden.
Unless I'm misunderstanding the summoning rules, he gets to summon them anywhere within close range (45' for level 8), and they get to full attack immediately, getting all of the buffs that affect the square they're standing in. If this isn't right, that'll be another issue I'll have to address.
You do realize there is 1 round casting time on Summon spells, right? That means they don't appear until the second round on the Summoner's turn (unless there is some ability I don't know about). Also, AC 23 is not very good for a BBEG, it's more like a standard fighter at low levels. A CR 11 cleric should be able to get enchanted shield, armor at least, bringing AC up to around 25. And since he was supposed to be spelled up, he should have Shield of Faith (+3 deflection) on. The wolverines are not too bad with their support anyway, but should not be the main attack!
Oh, I see the Summoner can indeed Summon as a standard action, but that means he can't use his Eidolon. Dismissing the Eidolon is a standard action, so I don't see how he could do all that in such short time, and the Bard certainly use normal rules for summoning.