TBH, now everyone has stronger mons than say, 3 months ago. I'd argue that the optimal prestiging range is 1200-1400 now. Some really competitive areas have towers sitting at 3k. If you are using a 800-1200 pokemon, you are using an unnecessarily weak pokemon for max prestige.
A lower attack stat isn't necessarily ideal though (and for wiggly you definitely want a higher one!), as even though it cools the CP down you want a mon that is capable of finishing the defender! For prestigers, 15 attack points means a lot more than 15 attack points to a dragonite/gengar. As long as you get the CP right, the exact distribution of IV need not matter too much.