After playing some wifi ranked doubles matches with my friend, we noticed that almost all teams have the same strategy. One player does all the passing and shooting while the other just spams tackles to clear the field. Well after one game where the postgame summary showed our opponents with 78 hits, my buddy's reaction was "that's 78 items we could use". So we did that next game, we used something like 50 items, and completely dominated the match. This trend continued for most of the night.
So just remember, tackle spamming might work if people don't catch on, but once they see the postgame summary and think to spam items in return, you'll be in for a paddling.