How about a great sage instead of the enchantress? A great sage with Order 3 Sloth 3 Heat 3 Mis 2 Magic 1 and a bunch of magic can research alt-3 by turn 4. Then you send out your 4 yakshas who can buff up and have minor earth, nature, fire, air blesses. The first 5 turns are slow but after that your expansion ramps up quickly enough that you could be leading in provinces and research.
I faced a similar pretender design for Eriu in a recent game and it turned out pretty well for him. It went so well that he eliminated me before year 2 ended, and I think he's currently one of the top contenders in the game.
I think with a couple tweaks your strategy has some real promise
