You know hoh has a static altar? woo, if they run away thats a point to you either way.....
an old build i used to use:
e/me
fire:11+3+1
energy storage:10+3
Inspiration:10
Energy Drain [e]
Mantra of Resolve
Meteor Shower
Arcane Echo
Fireball
Energy Tap
Ether Feast
Conjure Flame
Arcane Echo meteor shower.... no need to add echo on top of that, either they move or they die generally.
When meter showers 60 second cooldown is still in progress, then arcane echo fireball lets you rip of 4 in 10 seconds. Nice spike and a little bit of aoe.
Ether feast, energy drain and energy tap provide a secondary energy denial aspect, as well as allowing you to keep going with the high energy skills.
Mantra of Resolve stops you being interrupted. A'Echoed shower takes 13 seconds to cast it, and thats just asking for it tbh
Some people like to spam flare, but its dam unefficient on your energy. Just grab a decent wand and put conjure flame on, the dps is slightly lower but the dpe is shockingly good.