use staff...you have only 616 haste with staff thats about 460 without staff and its low...in my opinion is about 800 haste in holy enough...and you dont need too much spell power in holy than its really better to use staff with spirit+ high haste
I agree, I believe it is the only staff with haste in 10 man besides the LK one so well worth keeping for holy. I would use Frozen Bone Spike + offhand for Disc if you play Disc at all.