in competetion, your strategy is going to be largely dictated by the rules of that specific tourniment. that being said, general gameplans are a good idea. but my idea of what a game plan is, is a little different.
knowing how to play on the weaknesses of different body types is one way to do it. in lue of that i would add to play against the weaknesses of what ever style the person might use, even deeper, what his instructors specialiaze in.
the standard - "if he kicks alot, then try and take him down" is one, however like i sad before, not every tourniment will allow ground fighting. so, if your interested in that kind of thing, then play to win at the tourniment. use the rules as much as you use your techniques.
i think that having strategy to beat body types is one thing, but since not every one knows how to use there bodytype to its full advantages, its less important then learning how they fight. people have a habbit of mimicking without understanding the in's and out's of why. so, if they come from a teacher who likes to attakc with certin combo's, then side step and counter. or what ever your good at. try and hit a grapeler in the head on the way in. grapel a striker.
its better to be better at winning, then kicking alone. fight the fighter, and all that jazz.
in my expirence