Is arcane bow suppose to do 5k dmg?

[yubaraj]

I am wondering this thing for a quite while and feel something fishy going on here.


Suppose rogue has 1200 dmg then calculation may be:
1200 x 2 (200%) x 1.5 (critical) = 3600 - dmg reduction/armor.


How come its doing 5k damage in pve. I don't understand how the calculation is done but something must be wrong.

Please STS tell us the calculation is right.