If its the double damage or mikawa spirit skill, it should be paired with SSR Tokugawa or UR Tohsho for higher success rate.

I do play brave girl ravens and kamihime project before but got bored because there were no PvP/gvg. I even saw 2 mononofu players on kamihime project when I had a glimpse checking the results of a certain raid(the time mononofu was inaccessible to android users) - level 91 Earth Crimson and level 66 Sirbadnews.