I also missed the vote. I think a J4 is really good for a russia crush.
In a J4, you will build 3 mainland mIC, and pump out 9 mechs every round. China will fall fast, those troops can attack russia, and US will not be able to leave the US East Coast until US4, so the first possible landing in europe is on US5. That lets Germany produce alot more for the russian front and it means that south russia, cauc and the middle east should fall pretty nicely to the german hordes. It also means that Japan should be able to take most of east russia while prepearing for attacking everything on J4. That huge japanese land army is not that easy for UKP to stop.