Turoa is stuck at 12th level, but you can summon him entirely now. In fact, you are augmenting his elemental powers a little bit. Unlike the enticed mass of fire (which you can summon a really big one of), there's a limit to how much you can augment him. I suspect he'll still be worth your time, as he is substantially more powerful than the typical elemental.
Stats in the Turoa thread:
viewtopic.php?f=14&t=230&p=4111#p4111