Rule of thumb for me, if I’m still alive 30 minutes in I’m going to win. 99% chance.
In Supreme Commander my allies would typically cover my defense b/c at the 20 minute mark I can kill 1 player every 5 minutes for the remainer of the game. If they donate resources to me it’s around 10-12 minutes.
I can hardcore rush when I’m in the mood but I really don’t like doing it.