But would not you need to get the lighting rod talent to avoid being stun, unless you are running a full ranger party. I find stunning to be particularly annoying and to often have collateral effect.
I agree that boulder dash is amazing. Not only it has all the qualities mentioned above but the limited aoe is also useful to avoid hitting your party members.
I have not tried blind but petrification works nicely as well to disable an enemy.
If you have lighting rod, do you run lighting strike and are able to lock down enemies.
