Ok so the way I do it is choose 3 teams each week and handle all their resigns and do not stop till you get the ones whose number came up resign.
For example.
Your number said to resign Lamar Miller for the Dolphins.
He is asking for 4 years and 25 million total. First offer should be exactly what he wants.
If he is negotiating....increase the offer by 15%. He should then resign.....if not. Let him walk.
Don't get too bogged down with the 31 teams your playing as.
As far as your main team. Do whatever you need to to resign the guys the numbers came up good for you to resign. And of course don't generate a number for guys you want to let walk.
Have fun with it!!!!