Your bonus points consist of a build answer

:
Arcane Echo
Crystal Wave
Teinai's Crystals
Glyph of Swiftness
Obsidian Flesh
Stoneflesh Aura
Mantra of Earth
Storm Djinn's Haste
Earth - 12+1+3
Inspiration - 11
Air - at least 4 (two spells for Glyph)
Estorage - whatever's left
I could replace Arcane with Sliver but I don't like them running away, and I can't be bothered with getting them against a wall. Six shots of a Crystal spell (three at first thanks to AE, then as they recharge) kills entire mobs because they never try to escape.
I haven't tried this with Arcane Echo + Ether Nightmare + Cry of Pain since my ele has shit for Sunspear, but it'd probably work great if somebody did.