Wow, I don't really suggest you to do it, but if you're so set then I can give you some hints (Not minding the amount of reinfs):
1) Use two air transports, one to get Moscow and the other to get Russia Northwest.
2) Get your militias closer to Kiev in turn 3 for defense. Example: Let's say you took Belarus, then send 3 militias of those 5 to Belarus's city (the one closer to Kiev). In Russia Northwest, transport some militias by ATS to try and get Smolensk (I think?) in Russia Central (closer to kiev...).
3) If you can't find what to do with the infantries, just make walls. Don't suicide them, you want your enemy to attack them.
make a game and try to do that, advice me if you need help on it...
You probably saw my thread about Ukraine's GW before... but if no then I'll give the link just in case:
http://atwar-game.com/forum/topic.php?topic_id=16589