tigers, unicorns, and dragons... probably the best choice...
I don't quite understand...
It's better to build Elves when you have a lot of wood... but if you don't, then Tigers are a good choice. I don't understand the choice of Unicorns at all; they would barely reach the enemy, while Griffins are ready in a flash! Besides, Unicorns have fewer hit points!
The choice of Dragons is justified if you have a Warrior hero. :D