It was difficult to measure just how good Deb really was because she usually completely out-classed her opponents. After all, her segments with Crystal weren't called "Deb's Corner" for no reason -- she and her husband were the producers. So most of the time Deb was "carrying" the fight in order to make it interesting. The only two fights that I think might offer some insight were against Marnie and Mandy. Marnie was never quick to submit and she pushed Deb to the point of near exhaustion. But Deb was not about to lose, so she summoned all of her energy to finally get the stubborn Marnie to give up. The fight was entertaining, but relatively tame. Mandy had fought other times and was undefeated at the time that she decided to take on Deb. Deb mopped the floor with her.
Against Michelle? Can't say. The perceived age and height difference might have turned out to be important factors, but this match up isn't something that I've ever really thought about. How Deb might have fared against the likes of Lady Ellen or Wildcat Kelli is a more intriguing question, at least for me.