My specific plan was to hit Frozen's entire mainland core on T252, with about 20 nukes and commando tanks, capturing outer-coastal cities and razing the rest. I had 4 commando GGs, which were all able to upgrade to Modern Armour the turn beforehand. I would then have tried to paratroop onto Frozen's inner-islands, though that's probably the diciest part of the plan.
Crucially I would have captured Cristo Redentor (logistics were a huge problem for me after about T230). I would have swapped into Universal Suffrage, resettled all of Frozen's razed cities (maybe 6-8?), rushed airports->bomb shelters in them, and been able to start airlifting troops onto the continent relatively freely. The other reason for hitting Frozen is because I could have cleared out your defenders before sending the nukes in, so SDI wouldn't have been a problem.
Then I would have either hit Piccadilly's territory or Ichabod, maybe both at the same time. I would have been producing at least 50 Modern Armours for the front per turn, which I think(?) would have been overwhelming but I'm not certain. With plenty of nukes on top, of course. On top of my MFG, I think whips would have accounted for at least 10,000 hammers per turn of unit builds (more initially, but slowing to that), because I could 'sustainably' whip at least 100 pop per turn by now (happiness was becoming a problem in my core, but without teching it's not that relevant anymore. Tarkeel's continent was still pretty happy).