How many times do you have to dupe 4* Joe Fixit to get a 5* champ?
I think it's 42.
You need to dupe him 5 times to get him to Sig 99.
Then you need to dupe him 37 times to get enough 5* shards for a 5* crystal.
So every time you dupe your Joe Fixit, if you think you're just one step closer to pulling a 5* Joe Fixit and starting the process all over again, it should help soothe your butt hurt over pulling another Joe Fixit!
Full Disclosure: When he was introduced as a champ, I was grinding for him in arena because his abilities sounded awesome.