(edited by Stubie.5834)
So I hit level 80
I don’t know what to tell you about full zerker. I run the same staff build I run in WvW whenever I do a dungeon which is 0/0/2/6/6 with celestial armor, zerker weapons and a mix of zerker and knights jewelry.
If you don’t have any cantrips or vigor or energy sigil, I would imagine you are going to get downed a lot. I would keep your distance, use swiftness to move out of AoE fields whenever you can and save your dodges for when you really need them.
As might stacking in staff, it’s not as viable as with other weapon sets. General rotation is to start in earth, cast earth 2 on top of yourself, swap to fire 1, cast fire 2 on top of earth 2 and then cast Arcane Brilliance or Arcane Wave if you have them slotted. Earth 2 will explode before fire field expires for 3 stacks and you get 3 more from wave or brilliance.
Use this same rotation, but with lightning 5 instead of fire 2 to give yourself perma swiftness and also with water 3 or water 5 instead of fire 2 for aoe healing which will improve your surviviability.
You can also do this with water 4 instead of fire 2 for aoe frost aura, but that isnt as useful in PvE as it is in WvW.
A good choice to watch would be this Stacking 25 might video.
Otherwise it depends on the game mode you’re talking off. In PvE the best choice for example would be to stay in fire most of the time – when playing staff.
There still is a variety of viable builds/rotations and skills which can/should be used to get the greatest potential out of the staff.
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Maybe you could be more precise.
Greetings