Hi there. I spend most of my time deep jigging and live baiting between the Whistle Buoy, Carysfort Light and the Elbow. Love the area for muttons, grouper, Rican Pompano, wahoo and kings.
Only recently have I started swordfishing near these spots because logic dictates there is not as much pressure down there. Like you, I don't know precise sword areas but I have ventured out in the late afternoon for a couple sword sets south of the Poveromo Canyon....about 16 miles southeast of Carysfort Light in 1500'. I have not had the best of luck but have released some pups about 42'. However, they got to be out there. There's also a place called Todd's Hill I believe southeast of Molasses which is on the Top Spots fishing and diving chart for the Upper Keys. If they are slaying them off Islamorada off Alligator and the Humps, they got be off Key Largo too.
Good luck. After the tournament in a couple weeks, I will give Northern Key Largo another shot for swords. Keep us posted on your efforts too.
Juan