Most bosses need to be chain stunned to get rid of their Defiant stacks so you can actually cast it
(the 90% reduced blind, etc makes them immune to CC), and well I haven't seen that work so well.
---------- Post added 2012-08-31 at 08:34 AM ----------
I disagree in PvE that it puts itself in less dangerous positions. Sure, if you cast it at say max range, it will generally stay at max range until something runs over to it, but with your sword in your main hand, are you going to stop DPS to run over and be able to drop another one and run back in?
The Swordsman stabs something in the face, and then it jumps back out of the way. It waits there, jumps in, stabs, jumps back out again. Through that entire motion, it not only pushes itself further away from a target that moves towards it
(or closer to one moving away), but it actually
dodges throughout the animation. Anything that would've hit it while it attacks does is simply Evaded. Cleaves, PBAoE, the swordsman itself has more survivability than the Pistol does when you're holding out in melee range.
PvP, yes, the Pistol helps when you're getting kited, and running out to keep ranged pressure on someone isn't a bad thing, But people vastly underestimate just how useful iSwordsman is.