BG for min-maxing.
Similar to Wizard Marshall that found its place when you capable to hit necessary damage but didn't have enough HP, for whatever reason, on top of coincidentally released with Cernunnos fight.
This one works better than BG if you're kind of players that can easily warrant usage of OC (read: whales) or simply players that always get the newest SSR available because newer DPS, especially SSR ones, clearly will prefer this CE than regular BG. Trung Sisters, Bazett, Charlemagne, Ruler Moriarty and Arcueid for example.
In their setup this CE arguably a superior pick, especially when facing something like Koyanskaya. Looks bad for simple reason of F2P wouldn't think of min-maxing stuffs with OC effect.