PPR Keeper Advice

12 team league. I have Julio, Evans, David Johnson and Jordan Howard currently rostered from last season. I’m thinking about keeping Evans and DJ. Giving up a 2nd Rd for Evans as a first time keeper where he was drafted, and a 5th Rd for DJ. Iv been keeping DJ every year ever since I plucked him from waivers when he blew up, I think in 2016. Every year we keep the same guy he goes up 2Rds the upcoming season in our league. I’m currently picking 2nd this year, any thoughts on keeping Julio over Evans, I would give up my 1st Rd pick for Julio since I drafted him in the first last season. Or should I try and deal Julio for an additional 2nd Rd and/or 3rd/4th Rd pick before I just throw Evans or Julio back in the pot???