Utz, the nice thing about KGF in Revised is it can be deployed flexibly. Some opponents will stack Western and won’t allow the Western stack tactics I’m talking about, forcing a long game.
The conventional winning strategy for Allies against an expert level Axis is UK shucks to Arch/4, USA shucks to Africa/12. Russia first focuses on dead-zoning Karelia by getting as many units to Western Russia as it can, then it gets men to Persia in conjunction with UK air/armor that landed in Arch. From there, the Americans reinforce Persia. Hold Persia and Allies can win the economic war.
If Axis is skilled, this makes for a long game. If at all possible, it’s nice to shake things up with more aggressive strategies, and that’s where mass landings on Western along with aggressive Russian attacks come in. From SZ 4 or SZ 12, the Allies can hit Western, so there’s a lot of room for flexibility.
Re USA1 ACs, it’s not strictly necessary to buy one if UK will land in 12, but it can be useful if UK will drop stuff in Europe immediately.