Board Thread:Questions and Answers/@comment-32149650-20170531044934/@comment-31529160-20170531054459

Well you guessed it right cuz it's used best on powerful fighters to boost up there ratings and consequently increasing their ability damages as well and while some of the silver abilities may still be left incompletely trained.It's recommended to apply it on the same fighter for x5 boost if possible(Good fighters obviously) as it speeds up the training immensely.Happened to me with NP Bisping as he was still untrained so i applied his duplicate on him meaning i'd reach his max rating prior to training all his abilities.