If you want to be best dont play stamina in pve. People ask necromancers for veteran pve, because of their ultimate that increases damage taken.
^ This and I'd say magsorcs and magblades are the two hardest hitters atm, and I don't remember seeing anything in the pts patch notes that will change that for U31 in a few weeks.
It probably only matters in a few instances of vet/HM raids, and even then I like the "play to your strength" mindset. Many people find magcros annoying to play because of the corpse management and skills that don't work, which is part of the reason they tend to be in high demand. So if you can hit high numbers on one of the meta classes, great, but if you can perform on one of the others, that will server you just as well 99% of the time.
Magblades running MS & Medusa are very strong right now. Stam necros are still the best stamina DDs. Likos has some very good DDs, but you need to adjust them to the content you are running