I play in an identical league, 14 team, same starting requirements, and same bench size. Couple of rules I follow:
I gamble at QB, and only roster one. That means dropping my 4th bench option for a bye-filler QB for that week. If my starter goes down injured, there's typically another one available on the wire because maybe only 1-2 owners have a second QB rostered. There's gonna be a Foles/Rivers/Jackson type out there so if you lose your QB you're not left with Rosen/Eli.
I do the same for TE, using that 4th bench spot, unless I'm streaming at TE and just drop one for another. So that means I generally want my QB and TE to have different bye weeks.
I try to go for one elite (QB or TE) but not both. In a 14 team you need a difference maker, and unless you were lucky enough to get Mahomes last year your roster is going to have holes if you just load up RBs and WRs and go middle of the pack on the rest. This one is probably negated bc you're in an auction, if the prices and timing are right you could end up squeezing an elite and semi-elite combo.
Don't care if you have Gostkowski, Lutz, or Tucker. Drop your K on his bye for another one, don't waste the bench spot. If your league allows it, and if your starters are strong, you can always drop your kicker and take a 0 to get through a tough bye week/injury if you absolutely have to (again, IF your league allows it).
Same goes for defenses, unless you've got the 2017 Jags who are just scoring points like crazy. Not worth wasting a bench spot on a 2nd defense.
So that means most weeks I have all 4 bench spots taken up by RBs and WRs. Generally try to have 3 and 1 respectively, but not always. I try to make sure and handcuff my top RB if at all possible, or if he's sniped in the draft then I'll try for that owners top handcuff and make a trade. Losing a stud RB in a 14 team and having to go from Mixon to Ronald Jones starting because you missed out on Gio hurts the most when you're 14 teams deep.