I agree that mammoth tanks are too strong once they reach elite. One elite mammoth with one hotwire supporting requires at LEAST 3 high cost nod units to deal with. To be honest it is more like 5 nod units, which is a HUGE manpower investment to defend against just 2 players. This large manpower investment from nod takes players away from other parts of the map and gives GDI more freedom to invest in snipers, reps, inf path..etc. Also I honestly feel that the only thing that is preventing GDI offensive boosted tank rushes from being a 100% unbeatable game winning strategy is that most players are too scared to hold down the W key and suicide their tank in order to win the game.