With three categories related to points, one on shots, and one on FOW....it would be nice to have a potential 1C center to draft. Unfortunately, by the 6th pick, I'm not sure you'll find Draisaitl, Nylander or either Sam on the board. If I'm trading down, I generally don't think I'd want to go any lower than 4th overall.
It's hard to answer what compensation would be required to move down to 6th, due to the vagueness of your question. I have no idea if you are a competitive or rebuilding team, nor do I know if you can a minors system to protect players, etc.