[A3Mercury]

Might have been said but what I sort of figured out is that if he is going tech with a butt-ton of tanks then starve him out. Keep him from expanding out of 3 bases and you keep an eco strong.

Once all his minerals are gone and you attack and die, you can rebuild while he has to try to either hold off multiple waves of your 3.3 marines or expand. Catching him out of siege while he is moving out would be a plus but then you just keep rebuilding as he holds you off until he is out of tanks.

I'm only in silver but I've failed the same way more than once so I tried this. If you're bio and he is tech, do what you can to keep him from making a strong economy and then be patient with your attacks.