Originally Posted by
Jocias
Max DPS != effective DPS.
Immerseus, Protectors, Galakras, and Spoils are the only bosses where you'd use RJW under all circumstances.
Sha, Shamans if you do Kadris and AoE the slimes or stack them, Nazgrim if you stack him on the adds, and Siegecrafter if you're not on the belt are cases where you could make the case for RJW.
Norushen, IJ, Malkorok, Thok, Paragons, and Garrosh you should not use RJW.
6 fights without RJW all the time, another 3 where the chances that you'll need it are unlikely. That makes 9/14 fights where RJW would be useless. Gearing 15k haste for 5 fights seems kind of outrageous.