Best software for diagramming a series of martial art strategies?

I'm in a martial art, and I'm looking for software that would help me diagram my strategies in different sparring situations. I want this to be a visual diagram.

It should allow me to show, say:

I) if I'm in stance X and my opponent is stance Y

A) I can do this

a) he can react with A

   1) to which I can do blah 

   2) or something else

b) or he can react with B

  1) to which I can do something 

   2) or something else

B) or I can do this

C) or I can do this

II) whereas if I'm in stance Y and he's also in Y

III) or if I'm in stance Y and he's in X

etc.

But I want to be able to have "situations" which can be referred to in multiple places in the diagram... Since many situations would be reachable via multiple roads. Those shouldn't need to be duplicated.

And it would also be useful to have searchable attributes automatically added: e.g. show all decision nodes that are "children" of a certain grip position... even if those children are in radically different branches of the map.

And finally it would be great if I could also in this visual scheme easily link to other relevant info (e.g. drop in a video clip of a technique).

I want to be able to start creating the drawing from anywhere (in other words, start inputting a random situation in) and then insert it into the hierarchy at will...

Does this all make sense? Any ideas about the best software for this sort of thing?