In Pvp t3 gear on TL i had 6769 mana during the TL test event.
I tried to duel a BS and ran out of mana after the 4th spell
So i asked to remove useless heal rating stat (crap stat) for more mana/wisdom.
Stormfield is still the spell with highest base spell mana cost, so mana draining tactics is really affective on a ToS, and Incinerate Ether feat from the Dt hurts a lot. Oddly, Dt players don't talk about theses abilities when we talk about their PvP Power on TL