A lot of fantasy baseball leagues seem to be pulling away from the traditional Rotisserie style in favor of head-to-head or points leagues. But if you are in a Roto league, you know the goal is to gain in the standings, not in stats. The way you maximize your standings gains is to sell categories you have enough of. If your saves category in a 6-team league looked like this:
Teams 1 and 5 might be able to sell off a reliever (to a team that isn’t close to them in the Saves category) for another valuable piece that could help in another category. Team 2 should definitely sell off a reliever if he doesn’t think he can catch Team 1 (and he probably can’t, unless Team 1 sells a reliever). Team 3 has no chance to catch Team 2, so he needs to focus on holding off Team 4. Likewise, Team 4 isn’t likely to be caught by Team 5, so Team 4 should try to add a reliever to catch Team 3. Team 6 should be in selling mode for saves and see if he can get points in another category.