Not to argue from a fatalist perspective but if a rogue/ranger is having aggro problems they should try harder to avoid getting hit. This is very easy...you just ease-in to the target or adjust to the tank you have. As the warrior, if you BIS weapons, or a selection of them, you are still beholden to rng procs unless burning mallet charges, etc.

The main reason you bring a warrior over a knight is tanking disciplines (raid) or dps/mitigation (most group content). I wouldn't dismiss DPS from the equation to use an infestation...not that I should speak, my mid 50's warrior is using a frostbringer and sarnak warhammer for aggro :p. Id die to have one lol.

As a rogue of like 6 years on live though I always watched my ass. P99 players in general seem to be more likely to blame the tank. An odd dynamic for sure.