I only fist-weave just to keep zeal up if being in melee doesn't hurt me, the only time I truly fist-weave is Garalon. To be honest the best damage/healing spec is Disc right now the healing off Smite spec is disgusting.
Confirmed, 9k mana cost for Jab with a weapon is still active.
you're basically gonna have to melee just to keep certain buffs up as you're healing, if you were thinking of dps weaver get it out of your head