Quote Originally Posted by Aleisterz View Post
Is it the same % as the damage reduction/heals? (I know nothing of this lol)
It is, Tenacity got all the same % on heal, dmg dealt and reduced. So is a bit of a gain over the other, while DH and CH have to proc, even if the % look very stable to me in a raid. Ten bonus is always there. But in the end, the dps of a tank is so low in a raid, especially in progression, that having that 5% increase doesn't really matter for the clear.

I think is more about personal preference, as pld I feel quite safe with my all block shield that I avoid tenacity in meld (aside an early game mistake :P); concentrating on DH, for the simple reason that having a very low number, actually 0%, even a light increase actually bring more benefit than any other secondary stats. Obviously the 100% is a str+40 otherwise, won't make sense to use right side penta melded.