IMO I prefer to keep the weaponry at a lower "Attack". Here's my input on the staff:
--Combat Skill--
(1/5) Blast. (Dont add more, just use base skill)
--Hexes--
(1/5) Soulflay. (Dont add more, just use base skill)
(1/5) Pestilence. (Definitely worth adding 1 skill. This seems to net the most reps. Lvl 35 stumps was gettin 70 reps trying to Master the Staff)
(1/5) Wither. (Yes it looks cool, but the more skill dots you add, the stronger the reps and the harder it is to level later.)
(1/5) Flaming Skull. (Very effective, but same as Wither....)
(0/5) Banish. (only skill up to use on Stumps for max reps. Long charge time)
(1/5) Desolation. (gotta do it for the fun factor or to Awe the noobs on PR

)
Heres the ones that I would MAX!!!
--Passive Effects--
(5/5) Concentration. * [+50% Voodoo Recovery Rate]
(5/5) Spirit Lore. * [+25% Casting Speed for Staff]
(5/5) Conservation. * [-?% Casting Cost for Staff/Doll Hexes] (I can Wither all day and not drain voodoo enough to lose it)
(4/5) Spirit Mastery. * [+25% Dmg to Doll/Staff Spells] If you dont use Desolation, then use this max. Why skill up individual attacks when this works on EVERYTHING VOODOO. Only do it after Mastered, cause it makes it hard lol.
(26/26) Total
As I said, very hard to master when your attacks are so powerful. This build is what I found to be the best for me and my pirates. When I was trying to finish mastering my weapons, the staff was the hardest since I got lowest reps out of it. I skilled up my attacks and had Spirit Mastery skilled as well. Here's the Rep values (I did a test to see what attacks warranted the most reps on a lvl 35 stump):
--Combat Skill--
(1/5) Blast. *apx 50*
--Hexes--
(1/5) Soulflay. *apx 50*
(1/5) Pestilence. *apx 75*
(2/5) Wither. * apx 35*
(1/5) Flaming Skull. *apx 30*
(1/5) Banish. *u get 110 in crew, but WOW who has the time?!?*
(1/5) Desolation. *apx 35 but u can only do this once or twice before it kills u enough*
This is what I've learned. Use it if you like, feel free to check out my pirates on DXD. Angel is the oops pirate, but Hunter, shes doin it right this time