Juggernaut need some passive dr or damage immunity cd.
Rage just absolutely worst spec, little to no reason playing it atm. Vengeance have pretty much same st damage with better set synergy and slightly more defences.
Warmonger bugging 50% time doesn't help, as well as not having access to embrace the pain. I do doubt like others, that it will change anything for dps jugs.
Mercs atm feet "juggernaut" name ways better.
Assassin's are indeed very strong, mainly because of high burst + 2 vanishes. Still less cancerous than opers with constant dsync.