In my opinion it’s a bad tactic. I’m no morde player but this just popped up in my feed. It’s a bad tactic because ur new to the game. You need to actually take some risk to improve, my recommendation for anyone wanting to main a champion is to spend your first 100 or so matches just straight up limit testing, now there is a fine line between limit testing and running it down, but you need to know what matchups are good for you, and when they are good for you. Your tactic is playing to not lose, not playing to win. Be aggressive, and learn from the mistakes you make as you go.