there are more mobs with vulnerability to wind then to dark
not only that but the matk of the sph is higher then the necro
and the cast speed isnt such a big difference between the 2
max 50 cast speed or 100 dont know for sure
in pve i doesnt really count
when fighting with mage you fight 1x mobs not 4x ones ( solo i mean or duo )

omg thats the basic thing mengz.. whats ur problem?
sh rullz cuz good pve players choose +magical dmg items
+4 int(demon set) is way better for the sh-->higher gain,much higher gain!
add here the magical power SA(sowd for example) and here u have the sh that is waaaaaaaaaaaaaaay better the stupid necro..no mage will lvl in catas alone or with 1 buffer!u rly need top grade items to survive there and ffs stop talking bullcrap! sh can find more mobs to kill with 1 shot!his cdl is way powerfull!