I've only caught 1 musky EVER on lures over 10 inches... and it was a tiny musky
For me the 8-10" range has been the best
This fall I truly tried the big bait deal and I didn't get anything on baits over 10".... I had a big bait on at least one rod everyday once I hit November
I just sold every lure I owned that was over 10"
And some of the biggest musky to grace my boat were on 3-4" walleye cranks