I expect we'll go with a Hydra-like monster at running back, with 35 carries a game between the 3 backs spread out as such:
Lynch 15-25
#2 back 10-15
#3 back 5-10
With the numbers obviously depending mostly on how close we are to winning, Lynch getting 15 carries a game is ideal when we're 3 scores ahead, but when it's a tight game it might be 25, and when Lynch has less carries our number 2 and 3 backs get more (or less when we're behind).
That way we can hopefully keep Lynch under 250 carries for the season and hit the playoffs with him at his best.
Less carries doesn't necessarily mean less yards either - he averaged less than 17 carries per game in our last 4 and still managed to rush for over 100 in each of them.