This is a challenge for anyone up for it. So the Drifter, in my opinion, is one of the best written characters in the Destiny Franchise and i have yet to see a crossover with the Drifter as the main character. So here's my challenge.
The Drifter, after he starts his Gambit Prime gig, Ends up Transported to the Mass Effect universe with his ship and the haul. He still has access to reckoning and communication to the nine. He Finds Out he's stuck in the mass effect universe for 8 years til the nine find a way back for him. Time passes differently so a year in the mass effect universe is a week in the Destiny universe.
Yes's and No's
Slash? No.
Pairing? Meh. You can try, i can see potential pairings that will work out great.
Harem? No
If you want to take the challenge or have any questions, let me know.