bun bun packs the only known way to stop a dimention door teleport, via script....
deathbringer stun!!!!
deathbringer stun is the only way I have found will break teh ai script long enough to finish off a npc who is scripted to teleport away, so you can finsih it off.
Not sure if p word stun will do the same, suspect not, it does not have a save penalty. but deathbringer stun will work, gets past magic resist, hey it worked on monkey boy, and I am pretty sure he is stun immune, try power attack....use dual wield and impr hase, try to hit him many times to deathbringer stun or get a power attack past his magic resist...
thw worst ability in bun bun 2 is critical strike. have not seen any significant advantages to crit strike area effect weapons, and if your targets are wearing helmets, it stopps the multiplier dead cold. well, suspect with assassin poison crit strike may be ok, to multiply the poison injections, will try in nalias home soon.
frag genades have radius of 20'....not as good as arrows of detonation, area 30', and best of all, does little damage...yes, this is a significant asset, since you are using the blast to deliver the evil damage modifier. if you use bun bun, make sure you have helmet at all times!!! as you will be often caught in the blast, and if you try out critical attack, this is bad...

They call me Darth...
Darth Gizka!
Muwahahahahhahahha!!!