Save your sigs for someone else unless they're about to expire and you don't have a better candidate. His sig can make him a slightly more annoying defender, but doesn't add any crazy utility that really impacts his offensive effectiveness to any degree that you wouldn't miss it. He's definitely a better champ duped, as many are, but not worth 7* sigs at this stage of the game.
Under no circumstance should you rank your bishop or put sig stones into him.
Under no circumstance should you rank your bishop or put sig stones into him. He is at R3 and ranking him is one of the best decisions I have made . He is a beast and incredibly useful even unduped
Under no circumstance should you rank your bishop or put sig stones into him. Seems nobody else got it but I got it.
I agree with @Nacho98 He is a terrible champ unworthy of any resources at all. Dr. Zola