the one posted above is a very poor spiker build..
Elemental Attunement
Air Attunement
Glyph of ele Power
lightning strike
lightning orb
chain
blinding flash
rez sig
with the 2 attunements up you get 80% of the energy you cast back so you can cast all day
keep the glyph on, and with certain weapons you could get a 20 attribute point hit 16+2 from glyph and +2 more possibly from weapons
the best way to do this is get 5 spikers 2 monks and a shutdown mesmer..have the mes take out the proto monk so all you spikers can just own people..
Air magic 12+4 (sup and head item)
energy storage 12+1
make sure one of your eles is a ranger with frozen soil

so when you kill things they cant be ressed super quick
ive made it to the hall many times with that build..if you dont have a good caller though you will never get anywhere..you gotta attack at the same time!
enjoy