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the problem isn't the fact that I don't know how to kill the goons. The problem is, I don't know how to kill that many of them with the resources I have. My defenses(on money maps) usually consist of a quad layer of cannons all around, a few probes to replace them, and maybe 30 templar with psi storms and some arbiters. But I've been hit by multiple players who've massed up armies of goons of sizes that need 3 numbers to show. I can take out a large number of them with cannons to slow and storms to kill, but I get overrun eventually. I can deflect guardians, bcs, carriers, marines, siege tanks, etc well enough, but with goons, they're like zerglings sometimes...no matter how many I kill, they keep coming back for more. >>
Oh my god, you're a turtler! If you ever played me, you'd be dead before that first layer ever got completed.

Even if you got the layers up, any good player will be able to take you out. Quick reaver strikes will totally bust up your cannons. Have a couple shuttles each carrying ONE reaver drop some, and then do a warp with an arbiter. The reavers drop and bust your cannons up, but by the time other cannons are ready to fire, my reavers are gone. Also, have you ever seen a 1 carrier, 3 halo carrier cover? Those things will cover my reavers as I bust up your cannons.
Also, I like to run in some things, and then stasis my own guys. Yea, you better watch it, huh? You have to move men from your main defense to defend against the guys that'll come out of statis, then I'll bust in from the front. The best defense is a mobil offense.
If he's got a lot of goons and you like BGH, then stasis works wonders. In a choke, stasis some of his goons up front, and the rest will be stuck behind. bring in some temps, and there'll be nothing but goo on the ground.
For early and mid game, a good microer should be able to win with 2 groups of goons, and a group of zots. move the 2 goons about. Using one as cover and the other to fire. About half way into the battle, send in the zots to clean up. Quick hot keying and you should be spending about 3 seconds total to command and then go back to your resources.
Last time I played, my record was 10,560+,30. Yes, I was the guy that left at the end of the game.
EDIT: Needed to add a word.