honestly, i recommend BoW for grinding for less downtime. For instancing the first buff you need is BoSalv. If there's another pally to give you BoSalv, then BoM is the next one you should probably get unless you have enough strength and agility for BoK to make a difference. to get the same AP boost from BoK as improved BoM, you need 1320 strength. If you have less than that but enough agility to get a good boost in crit, you still might prefer BoK.
I have 508 strength and 189 agility, so for someone w/ stats similar to mine BoM is definitely better. I'd need about double both those stats before I'd take BoK instead of BoM. You didn't post your armory so I don't know which would be better for you specifially.