Alright. I'm not gonna go through the exact build order since that will take a while and there are many possible build orders (I have not yet found the perfect order myself). Basically, this strategy is turning an unstoppable defense into an unstoppable offense. Here's what you do:

The mix is dragoons/archons. Get them out as fast as you can. At the choke point (entrance) to your base, build cannons and put reavers in between your cannons. Have some zealots out front in case of a tank attack. Also have a high templar with psi storm upgraded near this choke point. This should stop any head-on mass hydra or ling attack.

Cover your base with observers and a few cannons and spread out your archons and dragoons. Make a lot of shield batteries for your archons.

Build 4 carriers and as many corsairs as you can depending on your economy. Uprade disruption web. Build 2 arbiters with recall.

To attack: Attack with ur carriers with the two arbiters following and place disruption web with ur corsairs on any missile turrets, cannons, goliaths, and etc. After casting disruption web, send in ur corsairs to attack any science vessels, overlords, or air units. (Be sure to have observers). Group ur dragoons and archons together and recall them in. You can also shuttle them in if u have shuttles. Also, recall or shuttle in some high templars to zap mass enemies.

This works only, i repeat, ONLY in maps with massive minerals (BGH) and works better one on one than in ffa.

Remember, upgrades help A LOT. Try to get three forges going.

Good luck. If you have any suggestions or comments email me at: misterdiscopro@hotmail.com

Also, my name on battlenet is Master_ZZZ.

CreepColony's Opinion: Most players don't build a lot of cannons as defense, since they take up room and are expensive. Most people use their army as their defense.