If you are ONLY losing, then do the minimum 10. You will receive basically the same amount of points per week until you break 1500+ team rating.

That being said, you're not losing anything by getting more practice either, so if you have any desire to improve, then get more practice... and maybe play a real comp. You're not going to fool anyone by "drawing fire" on your pally. Intelligent players will not waste dps on a dmg sponge.