I have no experience with competitive powerlifting, but your mention of benching with a wide grip made me think of this video. Kind of fun to watch. Check out how wide her hand placement is. I've tried it without wrapping my wrists and it's really unnatural for me, and I felt like it had the potential to really sprain something. What is your height and 1RM for bench?
Related, I've been doing more bench variations to build my chest. Flat bench, followed by Incline and decline benching, DB squeeze press, and cable chest flies. Also, I like decline pushups, with my feet up on the bench to try to hit lower pec a bit more.