I have always wondered about whether I could be gaining damage through the use of grapple weapon. I haven't really seen it discussed (forgive me if it has kindly link me!).
Here is a cross post from a post I made on the Blizzard US Monk forums (
Use Grapple Weapon in PvE? - Forums - World of Warcraft ):
In a normal scenario, it seems like using it (grapple weapon) would be a slight dps loss. You spend a second to get 15 seconds of +5% dps, so instead of doing damage = 15 seconds x DPS = 15xDPS you do damage = 14 seconds x DPS x 1.05 = 14.7xDPS. That a loss of 0.3xDPS damage.
However if you use it in a situation like right before heroic wind lord mel'jarak gains recklessness, theoretically you would go from damage = 1 second x DPS + 14 seconds x DPS x 7 = 99xDPS to 14 seconds x DPS x 7 x 1.05 = 102.9 DPS. That's a gain of 3.9xDPS damage.
More generally speaking, you could do it before every tigereye brew. Assuming a TEB damage increase modifier of +40%, you would go from doing 1+14x1.4= 20.6xDPS over that interval to doing 14x1.4x1.05=20.58xDPS instead. By dumb luck, that comes out to be very close to even (but a slight loss).
Being a bit more intelligent, you can estimate how much of a damage modifier you would need to justify using grapple weapon beforehand. 1+14*x=0+14*x*1.05, x=1/0.7= roughly you'd need to have about a 43% damage increase for it to be viable. Remember that just having that damage increase is not enough, you only begin to see a damage gain if you use grapple weapon before you actually get the damage increase.
The two big things I left out of my quick analysis was that your DPS during the GCD of using grapple weapon is nonzero. I should have put in a figure representing the fraction of your DPS that would come from autoattacks+tigerstrikes. Also I should have subtracted something to account for the damage loss incurred by spending 40 energy.
If that silly reorigination trinket actually becomes a thing, then with the absurd amounts of mastery we may have it looks like using grapple before tigereye may very well be a thing.
Does anyone have any thoughts on this topic?