Here’s a look back at Week 15’s action, and fantasy advice for the week ahead: WEEK 15 RECAP Raiders 63, Chargers 21: Joshua Palmer managed 113 yards and TD in his first game back, an embarrassing loss at Las Vegas. Palmer won’t have an elite quarterback throwing him the ball for the rest of this season, but Easton Stick appears to be competent enough, and he could be the top target if Keenan Allen misses more time with a heel injury. Bengals 27, Vikings 24 (OT): Alexander Mattison was sidelined by an ankle injury against the Bengals and Ty Chandler took full advantage of his absence, running …