Reaching 100 rumble wins was probably my most significant achievement in Destiny. I really didn't like rumble matches, because I wasn't a good PVP player. Maxing out my grimoire score made me a better player. I'm not the best, but I'm a lot better than what I used to be. I'd suggest playing rumble by yourself. If you reach 100 rumble wins by your method you might regret in the long run. Try playing by yourself, and have fun with it! : )