In my opinion the best way to use them is to use them the way they where ment to be used..
1. MBTs (T90's,M1A2's) Protect Light armour from other MBT's,search and distroy other armour.
2. IFV's (BMD-3,BRADLEY's) support infantry directly and ambush MBT's to support infantry,anti-aircraft roles and spot snipers for freindlys.
3. SOFT SKIN (HUMMVE,COBRA) move important infantry(RECON,MEDIC,andengineers) to locations as needed, and use as anti- aircraft platform.
basic rendition of my opinion, any others?