I'd actually recommend OP to go for a myth piece other than legs (after geting Thyrus Zenith, of course). The fact that Allagan pants drop from turn 5 shouldn't matter at this point. They are going to be seeing a larger immediate increase to healing overall by replacing a piece of Darklight which would be much more helpful in the short term and help them see any coil gear at all. Maybe if you manage to get the crown or robe from CT you could replace the other slot with a myth piece.

But still get the Thyrus upgrade first.