Waller or Jones Jr

Standard league. I can start a TE in the flex. Right now it is David Montgomery. I have Mark Andrews as starting TE. Right now Marvin Jones is on my bench. Should I add Darren Waller and drop Jones and consider putting in the flex? Or am I over thinking?

Dropping Jones would be tough, but I believe Waller could have a big day. May not be smart long term to hold to TEs, but with the Raiders playing KC should be a shootout.