At the Combat Training Centers (CTC) there are dedicated OPosition Forces (OPFOR). Whether you go to the National Training Center at Fort Irwin, Joint Readiness Training Center at Fort Polk or Joint Multinational Readiness Center at Hohenfels Germany you will get a dedicated OPFOR that knows your tactics inside and out.
So the OPFOR have come up with some interesting tactics to counter the BLUFOR tactics.
Send probing missions all night long to keep a unit at 100% readiness instead of on a rest cycle.
Shoot the driver first to immobilize a unit then take the gunner and passengers in order. Vehicle mobility kills can force the BLUFOR to commit vehicle recovery assets which can then be targeted.
Use CS gas and Smoke like it is running out of style, making the BLUFOR react to a chemical attack will buy you time to egress.
Things to think about, people make the worst decisions of their life when they are Hungry, Angry, Lonely, or Tired. If you can force your opponent into one or two of those states it is only to your advantage. You can make a unit combat ineffective by simply cutting off their water resupply for a few days. Maximum payoff for minimum risk.