We have most of skills required Combat advantage(CA). If you can't kill him enough fast with skills Poweful Blow,Sweeping Kick and Charge, powerful skill, the opponent will kill you first. We need to be in close range to the opponent to attack or use disable skills to knock him down, stun him but all of those skills require CA. So, how to kill someone who have high DOT skills when they cast on you and kite ? Maybe you need some allods gold to update your weapons.

Intimidation has a 15 yard range, and 20sec of fear. Chuck can throw your weapon to knockdown target, disarm yourself for a few sec (run up to them in the mean time). party with a Psi and get a movement speed buff. Charge up to him 4sec stun where you can just bash on him. Grapple will be -50% movement speed for x duration.

High damage. Fairly high energy cost, causes bleeds, and deals more damage to knock down attacks is the advantage of Powerful Blow in Allods. Is as fast as your weapon speed. Pretty much the bread and butter attack. Generates 20 combat advantage. Forceful Kick. At rank 3 this has a 55% chance to knock someone down. Energy cost is low, but so is damage. It does generate 15 combat advantage though.

Charge which is your "get in their face" button. Use it to also give your opponent a 4-6 second fear where they just stand in one spot unable to do anything. With the Menacing ruby skill, you can double this duration. This give you 15 combat advantage. The energy cost for this skill is relatively low.

Hack which is a "snaring" ability that reduces the movement of the target by 50% by X amount of time. It also generates 20 combat advantage with a fairly low energy cost. One down side is that is has a 3 second cool down on top of your weapon speed and it gets put on it's cool down after a charge.