User blog:Reborn23/100% BB gauge reduction Krantz

Hi everyone! I'm trying to build a 100% BB gauge reduction Krantz. I know that it is possible because I already tried it with Shera as Leader and Ezra as Friend Leader. Then I gave him Invigorating Device and Forbidden Apple. In the end: 30% (Ezra) + 25% (Shera) + 15% (Invigorating Device) and + 20% (Forbidden Apple) + 20% by his ES = 110%. And it really worked! Now I want to reach infinity BB/SBB for him in Arena like Ezra is able to by her Enhacement.

Till now Ortus (30%) and Elder Hat (25%) are the highest BB gauge reduction Spheres I've found. If I give these to Krantz he can reach 55% due to Spheres +20% by ES and + 25% by LS. Unfortunately I don't have these Spheres yet. Are there alternative Spheres which can reach 55% reduction? Or even higher? Which Units can reduce the BB gauge Costs with their LS? I know that Orna, Shera, Ezra, and Solos and Ky are able to, but I'm not sure if these are good Arena Leaders. What would you guys use for this purpose to have SBB in first turn of Arena/Colosseum?