[TNixon]

[ QUOTE ]
You can't fine tune a strategy to just one opponent (even if that opponent is optimal) and call it optimal against all.

[/ QUOTE ]
If you can fine-tune your strategy in a way that is +EV, then one of the two of you isn't playing optimally at all.

That's the whole point of trying to find these equilibrium strategies.

***NINJA EDIT ADD***

[ QUOTE ]
Can you find a strategy against my P1 which gives P2 an EV > 1/9?
Can you find a strategy against my P2 which gives P1 an EV > -1/9?

[/ QUOTE ]
I already gave examples of adjustments vs your P1 *and* your P2 that are quite clearly +EV.