I have to let my team autodraft for a pay league (:-o
) so I'm in the same boat as you. I think pre-ranking is a must in case you can't find a worthy sub (anyone can draft for you, but can they draft well?).
Sometimes those autodrafts work to your benefit, since usually the picks are devoid of too much hype. Last year I got 2nd place with a team I autodrafted and barely traded for. It could work out... or at least, I'm hoping it does for me!