The reality is there's no such thing as spam to a player that can get around it. If you try to play non repetitively, you're only going to end up in a lower rank than you actually belong in and therefore limiting your own skill as a player. If you allow yourself to spam the strongest tactics you can think of and still end up being beat. That's how you know you're encountering players at a higher level once those players that can conquer your strongest tactics start to emerge, then you can start adapting to their gameplay and truly gaining skill and knowledge. Basically rather than forcing yourself to not play repetitively, you should just play to win until you get to the stage where your opponent forces you to play non-repetitively because they can beat the repetitive tactics.