Iwt is Interact With Target and is a feature wich makes you character try to "Interact" with the target it have. If you also have click to move enabled, the character will run to its target aswell = Win

There is a good step by step guide here on the forums by Ualaa, dont have link atm, but im sure someone can link it to you.

For the class matter, DKs over everything atm. (For PvP/Arena)