If you really, really have no other choice.
It still feels a little, I don't know, sleazy to me.
As long as it's done in restraint. I had a guy in a Yahoo public H2H pick up about three starters a day for a week to top me in wins and strikeouts in the final round. That jerk.
But in your situation, seems unavoidable.
"All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others."
— Douglas Adams (1952-2001)