Sam, if you use one of the software solutions that replicates keystrokes across the LAN, you won't have to bother with flipping monitors. Just all /assist and pew pew.

Also, there is no friendly fire in WoW. No AoEs can hit other realm-mates.

Something else to consider is that AoE healing spells don't work across raid groups, only within your group. NOte that this may change once the expansion goes live.

And yeah, if I were gonna do 25, I'd almost assuredly do mages. 25x arcane explosion would obliterate anything outside of a raid instance or world boss. Only thing neater than that would be seeing 50 DoTs on someone in 1.5 seconds. 8o