how many mins you get with a 2x starter?
the other thing is you loose training.
My starters habitually play 37-38 minutes, barring foul trouble or blowout. Of course if you want to start a guy with $50,000 salary and back him up with someone with a $2,000 then the sub might never even get in.
However, I am not quite sure what other people's experience were with players with very high stamina. It might be useful if someone shares it with us.
"I don't know half of you half as well as I should like; and I like less than half of you half as well as you deserve."