Originally Posted by
Royce
Again you have not figured in armor. You need to subtract armor from damage and 2 X armor from Crit damage. Despite all of this, I would still say sustained hits of 40 more damage, multiplied by the many targets the skill hits, would serve you far better than the occasional blast that overkills and wastes it's own damage accompanied by a majority of much weaker hits. PvP the Crit is more important, but for PvE big sustained damage gets the job done faster.
Edit: Just looking at your numbers, I think any reasonable armor value, even as low as 50, would swing things in favor of MM.