We at Underdog Fantasy released our Superflex tournament heading into the 2023 NFL Draft. I wrote up a Superflex strategy column last year that still holds up, but I'll quickly summarize my thoughts on the format, particularly for best ball on UD.
You're not winning anything without quality QB numbers. Don't f*** around and find out. About 13 of the top-20 players in points over replacement are QBs each year.
QB-QB starts are totally viable, but I also like going elite QB1 (Round 1) and then having two mid-range QB2s (Rounds 5-8) to handle the QB bye weeks, to provide some injury insurance, and to add some uniqueness in playoff weeks.
Draft a QB4 if you didn't go QB-QB to start. Insurance QBs still project better than a WR9 in a roster with just 2 WR spots.
WRs lose their value the most in this format because there are 2 WR spots versus the typical 3. We don't need 8-9 WRs anymore. 6-7 is the key number now.