I have a Blissey and for her stalling moveset is Hyper Beam Shadow Ball Softboiled Toxic And I asked for someone on the Battle Subway to RMT and in their answer they said that I should replace Hyper Beam with Protect and I probably will if someone could tell me the percentage that each time Protect is succesfull. Any help would be appreciated!!!
Protect will have a 50% Decaying rate, meaning if used more, the less of a chance it will have to work. Just divide 50% from 100 to know the percentage.
Source: http://bulbapedia.bulbagarden.net/wiki/Protect_(move)