I totally disagree. If the society used stamina, this would be GOOD for pures, because they don't have any cmans to use it otherwise. For example, if the powers are useful, I'm considering converting my Dwarven empath to Sunfist because he has gobs of stamina that is never used. The example sign took 3 points of stamina, which is pretty much nothing. Stamina comes back much faster than mana/spirit, even if you don't have much PT.