I think Iran should use the momentum to organize a walkout of the United Nations and discuss organizing an alternative international forum.
I think Turkey would be a good place to base it, given it has been the crossroads of civilization for at least the last several thousand years.
Considering the UN is primarily a tool of the West and the US in particular, using Israel's contempt for any normal negotiations to break it, would throw a monkey wrench into any remaining moral posturing by the US.
Not to mention it would head off a conflict a lot of innocent people will die and focus that much more attention on those responsible.
The bull is power.
The matador is art.