I believe the lamb sauce has been located my friends, last night on pc na in the non champ campaign I discovered something that was giving me noticeable input lag. I was testing a new build front baring mark of the pariah and back baring nma 2h axe, the result was getting deleted randomly and not having my skills go off after bar swap. The fix for this was putting a pariah 2h on the back bar but it also had me thinking about some past changes.
Murkmire I believe was the update that allowed your character to "remember" what set was on the back bar. This was a good thing for pvp players and trial runners since the arena sets could now be used, but all static sets would not be included like hundings would not transfer to the back bar if used. So going back to a set like pariah where the value is changed based on health which in pvp is changing all the time and then turning the set on and off, it could prove one of/or two things.
1.The set remembering feature could be a contributing cause of input lag, and some sets could be worse off than others (healing and resistance buffing).
2. Resistance flux could be a contributing factor.
More testing is probs needed but to me it would make more sense than aoe being the main cause, pls post here any findings related to this.