What raid buffs do you have? If you have at least 5% I wouldn't drop any haste since you are right at the LB cap. Mastery will be better than crit, but the less you use RJ, the more important haste is between break points. I would probably leave your gear as is and replace tear as quick as you can. You only get the spi from crits, and that doesn't happen every icd. Should help your regen a bit.