[spoiler]Forgot about the bloodline SLA.
I have to say that in spite of surprise and them being exhausted, this will still be a VERY hard fight for you, because you can't damage them enough to kill them quickly. Well... we'll see. By the way, IF you want to use Alter Self to raise your AC, why not at least be a Troglodyte and take +6, OR a Phaerlock (also a lizardfolk from Underdark), to snag +7, and also claws and some skill bonuses. It's also easy to metagame this: Your GGGG simply taught you the best form to AS into (that would be Avariel for fly speed, Asabi for 20ft burrow, lizard/troggy/phaerlock for armour, and something for swimming.)
By the way, if you are still mounted:
You get +1 for higher ground against the Babau, and with Divine Favour and full PA you should then have +9 (+11 with charge) attack bonus. The Vrock is large, so you don't get +1 against it. [/spoiler]
The Babau was hit by this inexplicable blast of air, that seemed to cut its very skin. While taken by surprise by the sudden onslaught, it quickly tried to gather itself, as did its companion.
[spoiler]
Init:
Babau: 14
Vrock: 18
If you beat those, you can count them as flat-footed for another attack. If you don't, you'll need other tricks. If you don't beat init, it will hit you back, now, so...[/spoiler]
Unless the attacker did something avoid it the demon stepped forward and returned the favour. Many heads surged forward to bite the attacker, and claws and horns followed up.
[spoiler]
I'm writing out all the AC hit, you do the hits and roll miss chances and stuff yourself.
Claw 30, 8 dam
Claw 32, 5 dam
Dragon bite 20, 11 dam
Dragon bite 19, 9 dam
Babau bite 22, 7 dam
Gore 28, 8 dam
Gore 34, 6 dam [/spoiler]
The Vrock did not immediately want to go close and personal. It cast a spell, and then seemed to multiply on the battlefield, there finally being 7 identical copies that moved in unison. Unless the attacker found a way to avoid this it then moved (with all its copies) directly next to Thor, and released a cloud of spores onto him (and the Babau). They dug into his skin, and caused pain and damage, and then grew into vines that kept digging deeper and deeper.
[spoiler]
4 damage this round, and 1d4 on each round for 10 rounds. That is 1, 3, 2, 2, 3, 1, 3, 3 , 3, 1 unless you get them removed somehow.
Your horse takes the same if it's still there.[/spoiler]