My step-dad shot clays, trap and sporting clays as his secondary hobby after migratory game hunting for 50-ish years. He used custom fit and molded in-ear plugs his whole life. Occasionally if he was at a competition or somewhere that talking was often expected while shooting was close he would double up with and electronic earmuff (like a Walker's Razor) to slightly increase the protection and allow hearing other's talking through the in-ear plugs. He refused to use anything else.
Personally, I have moved to his method as anything else doesn't work for me. I don't shoot enough to get accustom to something else. I found the in-ear electronic not to work that well, personally, and the "rubber fin" plugs (like the Howard Leight AirSoft style) those devices use will not work in my ears (and I find them annoying): they don't encourage use. The in-ear customs and the thin ear muffs don't interfere with mounting a shotgun at all for me.
Just remember that doubling up is important in 100bd or higher environments, but it only adds 4–8 dB of extra protection beyond single-device use. NOT a product recommendation: other than custom earplugs, said to be -32Db, I keep a few Mack’s Maximum Protection Soft Foam (-33Db) and my ISOtunes DEFY Slim BT Earmuff (-21Db) from work on hand (work max expected is 90Db, so -21Db works fine).
More for other readers, not OP... Main thing is to find what is comfortable: you need to wear it, and want to. If what you choose doesn't encourage use (because they are annoying, can't mount the gun, etc) then you must change.
Just my opinion...
