The devils desperately need depth, so they shouldn't be looking to move out Grits, especially at his price point.
Projecting for a long term extension on Luke Hughes, the devils really have no money to spend this year.
They have about 50.6 million invested in forwards with 11 under contract (including Grits). One of those is Kurtis Macdermid which shouldn't even count.
They have about 27 tied up in defensemen which does not include Luke Hughes.
They have 5 tied up in goalies between Markstrom and Daws.
That's 82+ million on a 95 cap. Assuming Luke gets between 8-9 million aav on a long term deal, that puts the team at 90-91 million with 11 forward (really 10), 7 defensemen, and 2 goalies. They'd have one meaningful RFA left in Cody Glass who would eat probably 40-50% of that if they want to bring him back.
Colton would be a cool add, but they likely need to move higher paid people out t first to make it work. Then they should make that move for futures, not cheap guys they project to play minutes this year.