What is the optimal Russia strategy in Axis and Allies 1942 Second Edition to effectively navigate the shifting alliances and maintain control over the Eastern front?

In Axis and Allies 1942 Second Edition, the optimal Russia strategy is to focus on building up defensive forces along the Eastern front to withstand attacks from Germany and Japan. It is important to maintain a balance between defending key territories and keeping enough units in reserve to counterattack when opportunities arise. Additionally, forming alliances with other Allied powers, such as the United States and United Kingdom, can help Russia maintain control over the Eastern front and ultimately secure victory.