At the very next provocation, the very next pretext, the tanks should be rolling toward Tehran. BEFORE they get nukes.
That would require boots on the ground and is impractical now and in the forseeable future. More practical would be to destroy their navy, air force, ports, refinery and nuclear facilities. Ruin their economy, institute a real propaganda effort (including destroying Al Jeseerah (sp?) and the young people of Iran would over-throw their own government, including the clerics.