Back to Ele
For PvE full zerk is the way to go.
For WvW you mix zerks with ptv.
Depends on what you want to be.
Staff? SnD? The classic balanced DnD? The DnF meta, The condi ele? The full bunker, The Diamond skin ele? The fresh-air build ele? The auramancer build ele? The glass ele that dies alot ele? :P
My suiggestion is to start with
Staff
SnF
DnD
DnF
DnS
and then make your choice.
D/F celestial cantrip slinger build + lava axe for ranged, it also gives might on auto attack