heya

well i only see one major problem.
once u start to meet the same opponent, by the second or third time they already have a plan. and ur's will remain the same. u can always adapt and try something different but, a hunter will do deterrence, a pala will bubble, a rogue will cos, a mage will ice block, shamans always have a grounding totem that will kill ur sync'd attack (imagine 3 pyros goin to a totem), a spriest will reduce the damage in 90% or put pain suppression. a warrior can always pop spell reflection

believe me when i tell u that in arenas, things get pretty bad quickly. u think u have an iwin button and all of a sudden ur burst is lost and my guess is that against 3 people ull have many problems without cd's up.

as for invisibility, it can get messy. wont dots break it? this means ull have to ice block first, letting ur opponent surround u with more chances to catch u while doing invisibility.

ress's can be a problem. while ur at the starting point doing evocation imagine a resser getting hes partner back in action.

but dont let this kill ur idea. go on and do ur best.