Trade deadline RB help

Hey guys, I’m in a 12 team standard league and currently in a 3 way tie for first place at 6-3, with the teams in 4th-8th sitting at 5-4. Our trade deadline is this Saturday and I’m concerned about my RB group’s reliability. Should I try to package some players for a better RB, or should I ride the depth at my RB, WR, and TE positions into playoffs? Some guys on weaker teams I’ve looked at are Gurley, Howard, Michel, David Montgomery, and Tevin Coleman.