The key to a balanced team for me, is to build an minimalistic offense and stout defense.
Gold (Montana/Young/Elway) Silver (Cunningham) Bronze(Dave Krieg)
Silver - Ricky Waters
Bronze - Tom Rathman (or Hodge)
Bronze - Dave Metzelarz (sp)
That's all I need to run an 80's west coast offense. Far/Near/And Split Backs.
you keep 2 potential runners in the backfield both that can catch and get 5.
You can send one of them in motion and the Defense won't know if it's run or pass. Giving you Matchup exploits against everyone online.
Defense can't sell out right or left. Both players can attack the flats and force the LB's into coverage. The MLB and SS are left with the TE, the WR's are looking at 1 on 1 coverage. You don't even really need anything better than a Bronze QB to run this. You can motion out RB's on Streaks to exploit mismatches against Generic LB's
I like to have a mobile QB because it adds that extra option. If the Te and Rb's are covered that means the middle is wide open to scramble.
You can force the defense into Nickle and Dime coverages against your base offense or Base Zone's that will open up the running game. Clock Control passing game and Running against zone's is how it works. Since you can get away with not having much on offense to stretch the entire field, you can create a monster defense (7 Defenders, 2 of them Gold even) and have an effective offense with many options that people don't see often.
WCO is short drops so you don't need an offensive line and you don't worry about who they have on their Dline. A pass blocking center is the only Olineman you should ever have to take.
You don't need to pick up a WR, and that's an extra spot for the defense. Set your WR's to Possession since they'll be doing mostly short routes and your QB's aren't bomb launchers. Personally I like to lean on a better defense than I do offense, because I'm no good at D
Realistically I can move the ball with 1 silver and 3 bronze.
Leaving me 2 Golds , 2 Silver, and 3 Bronze for the defense. You can make the front 7 from Hades with that. Or a Monster Dline with Safety coverage, or a Killer Secondary with Above Average LB's
It makes sense in this game to invest in an offense centered around TE's because there is no Gold SS, and no one takes 2 Gold FS's