Perhaps the most efficient system for attaching dropper lines are Bear Paw clips and snelled hooks, available in most tackle stores. Severe weather, big fish, and the sliding action and extra knots of top-hook rigs put line to the test. Heavy-duty coloured monofilament designed for cold weather shows up well on the snow, is abrasion resistant, and its limpness resists twists and tangles. When simply looping a hook to the main line, stick to 20-pound test. Use a thinner line for leaders.
Top hooks work with just about any ice-fishing rig.
The only problem is that they get in the way when fighting a fish on the bottom rig. With due caution, though, such an inconvenience will be of little concern. After all, on a good day, high rigs can more than double your chances for trophy lakers.