Of course.What I mean is that he donīt wanna to waste the sunīs power.And Venat also.Thatīs what matters not the cryst itself.
As long as Bujerba and the Marquis came to Rabanastre and fall on their trap and Archades can shot Ondorre with mist thatīs what matter(this particular plan is from Venat,not Archades).