I use 10-12# mono when trolling whether it’s for lakers, waldos or anything. I want the stretch to absorb the shock to enable better reaction time to get the fish headed to me. Often, at the strike, the canoe is heading one way and the fish is heading another way. It’s not possible to instantly stop the canoes momentum and grab the rod to fight the fish in that same instant.

Your mileage may vary. I have no quarrel with those who use braids or other lines. 8-)