Axis and Allies 2nd edition had two primary ground units: infantry (1/2/1/3 attack/defense/move/cost) and armor (3/2/2/5). Axis and Allies Revised increased the defense of armor to 3 and added an artillery unit (2/2/1/4) that has the special ability to increase the attack value of any accompanying infantry from 1 to 2.

Don Rae's famous infantry push mechanic was written for 2nd edition rules and argues that a good player will predominately purchase infantry, only buying tanks when they have established solid defensive lines.

How does the addition of the artillery unit and the increase in the defensive power of armor change the optimal balance of ground forces?