For those with IOS systems that aren't iPad Air 2, this might be the way to go. Most of you know that if you have an IOS device that's anything less than an iPad Air 2, if you obtain all the players via Late Round Picks > 2nd Round Picks > 1st Round Picks, you won't be able to edit your pitching staff.
This approach below will likely take a long time, or it could take a short time under fortuitious circumstances (explanation below).
I started by playing the Four Star Knockout Tournament. Autoplayed all games (if you win four straight in each tournament round, and you get your 200 gold entry fee back, plus a player). Of course it's impossible to win all games, so it's going to cost you some gold. But doing this a lot can put you high up on the Daily, then Weekly, Leaderboard, where you can earn gold back. Playing that tourney I nailed all 4*, then 3.5* and then 3* players. Afert doing that, my strategy was to draft only #1 picks, during a draft pick sale.
But here's where fortune smiled upon me. Starting at around 7 pm (EDT) this last Friday night, running until about 7 pm on Sunday night, there were non-stop 4 gold videos. Primarily they were Ford Focus ads. I amassed a boatload of gold. Then late Saturday night, there began a sale on draft picks (225 gold for #1 Picks). On Sunday I started drafting, and I got nearly (but not all) the 4.5*-5* players (including all but 1 RP) before I ran out of gold. And I can still edit my pitching staff. There are some small probs: some lag and odd glitches, but workable.