Need RB help! WHIR

[Tim Riggins]

I can start three of these guys: Chris Johnson, Jahvid Best, Mike Tolbert, Cadillac Williams. I'm pretty set on Johnson and Best but not sure who to play in the flex spot. Tolbert blew up last week, but Cadillac has the job more to himself for the time being, and I feel like he's more of a sure thing while Tolbert is TD-dependent. We get half a point for every reception. Thoughts?