As a hunter on my long-time other toon, I always looked at it from an AEP-like standpoint. Might gives me 264 AP. Since our rough calculations of AP's worth (in terms of "give me more dps") is at about a 2:1 ratio of AP to agility, that means that unless we already have ~1000 agility, Kings isn't likely to be a better DPS buff (esp in a 5-man, where you don't get both) than Might.
Yes, Crit is nice. In T4/T5 gear, I had about 500-600ish agility. 60 extra agility (1.x% crit and 60 AP) is a pretty poor comparison, IMO, to 264 AP.
Obviously, if Cheeky's spreadsheet indicates that Kings is a better solitary buff than Might, go with it. Using my last-known-gear in Cheeky's (an older version, I admit), and comparing myself buffed with Might vs Buffed with Kings:
Might: 1036 DPS (2141 AP, 24.5% crit)
Kings: 999 DPS (1927 AP, 25.74% crit)
Wisdom: 975 DPS (for reference
)
Might is ~3.7% better than Kings, for a hunter in T4/T5 level gear, not using a wind serpent. I'd say that it's not really close enough to matter, really, so going with whichever the hunter prefers is fine.
edit:
Since group harmony is my goal, if I have given someone might or kings, and they ask for the other, I do so. If two of the same class have different preferences, I pick one, and tell the other one that I'll try to remember to give them a short buff that they like.
