Sentinel or Darkhawk to r5

Jerkobson

So, I’ve had a tech 4-5 gem for along time (since 100% variant 1) have stark at r5. I pulled Darkhawk and sentinel pretty close together and they’re 2/3 of the top tech I don’t have ranked up.

Also have awakening gem and 100 or sonstones.

Whose the better r5?

I do have a 6* darkhawk but he’s unduped and probably going to take along time to get to the sig where he’d be worth r2.

So who would you r5?