Roster Construction Question

Hi everyone. I'm in a 12-team superflex (start 10 with a 10 man bench) that just had their startup draft. After doing some research on this sub, I'm not sure what the optimal roster construction would be. I see some teams with 4 or 5 QBs and 3 or 4 TEs. In my mind, this would limit the ability to have depth at WR and RB, which are positions with more frequent injuries. Are there any resources on how to navigate roster construction for superflex?