AUS player, thanks for the grenade changes
Mesmers Shall Rule Tyria!
Try using battle ping if you are in oz. I find it normally stabilizes your ping even in the worst circumstances.
I play cele engi or condi engi in pvp all the time.
Normally I am fine (average ping is 400ish with the most insane spikes reaching 3kish) though obviously if I am fighting a good player that is running a meta build or something of the equivalent then I am probably going to loose.
Just try playing with a friend that can help you out if you want to play something other then turret spam. But warn them before hand if the lag spikes are happening so that they know that ressing is a no go due to misplaced corpses.
Order of Intoxication [PSY]