Walkthroughs for custom maps.

I have one tactic against him, but I think it's too weak. Take Phoenixes and Harpies. Cast Anti-Magic on the Harpies and surround the Titan with birds, but I highly doubt this tactic will work. Because I'll have to resurrect the Phoenix every turn so the Titan doesn't attack. And the last battle with Titans and Rust Monsters made me realize that a Harpy without Blessing will deal 5-25 damage to Titans, and there are 500 of them.
So, I understand that Vipers are needed to cast Poison on the Ifrits. Could I use Spectral Dragons instead with the same success?