Thanks for the rates, guys! After testing, I decided to switch Forretress sets to the suggested one. However, I kept Duggy over Terrakion. I prefer his reliability, and he's also able to beat Bliss/Chan when played correctly. Plus, he's a lot better at setting up rocks than Mammy. I'm also keeping SE over Superpower. Despite getting some nifty KOs I couldn't get before, Superpower has redundant coverage with EQ. I would rather get the 2HKO on a non-choiced Rotom-W set with SE on the switch. I haven't gotten a time to test out that Genesect set, I kind've ruled it out prior to using Genesect because I wanted to Speed tie with others. After playing with the thing and understanding the role a bit better, I'll definitely give it a go.
"Give a man a match, and he'll be warm for a minute, but set him on fire, and he'll be warm for the rest of his life."
-Very wise person