Something like that yes - even many nukes isn't the problem really - it is same issue as in diablo, when you have a build that is sending to much packets/second to the server it gets choppy. So if you make 15 attacks/second builds that are also shiny? yea... :P
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Nonono, not double strike..!
Molten strike + lesser multiple projectiles + greater multiple projectiles +2 proj head enchant... each projectile can proc those arcs :P
Then take that accuracy=attack speed ascendacy and the ancestral totem that gives 20% MORE attack speed, and you will attack at over 15 attacks/second with 12 projectiles each attack that can each proc an arc at 40% chance.
It has the potentional of proccing like 72 arcs/second average.