On the island, there’s a cliff right next to the tundra area, nothing can walk up it except you and your tames. With taming sabers in particular, build a wooden trap as they can’t break wood. One fence foundation at the point where they get stuck facing the top of the cliff, two going down on either side, then one at the end. Place one wooden doorframe on the end facing the top of the cliff and two high down the sides, lure one or two sabers into the trap, wait till they’re attacking the walls then quickly block the open end with a two high wooden wall. Go off and level them for a while and they’ll starve themselves trying to break the walls, then tranq them out. Break the end and lead or ride out your new saber. This strategy got me a level 104 female saber in 30 minutes (trap building time included, I kept misestimating the amount of wood I needed)