1) With your 1st. starting four probes gather and build 1 probe. With those 5 probes make 1 more probe and with the 6th. probe make a pylon.

2) When the pylon is done make up to 3 probes to gather crystals and make another pylon to extend the limit. Then make a forge.

3) Start to make 5 probes at a time since now your economy will be high on crystals and start to make assimilators and star to gather up gas. While doing that send a probe near your base entrance and build 2-3 pylons followed up with photon cannons. DO NOT BLOCK YOUR ENTRANCE JUST SURROUND EACH PYLON WITH CANNONS IF RUSHES ARE PERSISTENT DOUBLE THE DEFENSE.

4) IF there are enemy bases anywhere near your base build defense around your base but if there isn't any don't build anything...your economy will decrease fast if you don't concentrate on building offensive forces.

5) Start to make another nexus in case there's an expansion near your base and start to make a 2 lines of pylons. Make more probes and 2 more forges/cybernetics cores while your at it.

6) Make as much gateways on one pylon line and make as much stargates on another pylon line. Your pylon line should have at least 3 pylons close together [save space in case of small map].

7) Make some more probes till you reach the 50 limit and start to make stargates and citadel of adun. Then when thats done make at least 2 templar archives. When thats finished make at least 2 arbiter tribunals [for upgrading quick].

8) Right now you should have a 50/200 limit and start to make as much dragoons and archons. While thats being made make a robotics facility and follow up with supporting bay and observator. Make at least 6 robotics facilites and make reavers. You should start research recall for Arbiters and make at least 5-8 Arbiters.

9) Now you have upgrading and send an Arbiter to the Enemy's base but send it to a weak spot or somewhere that the enemy build his/her base. If your successful follow up with the rest of the arbiters. Now your fully upgraded units and start recalling all your offensive units. Your army should be good enough to kill anything fast..Especially air units. Now your invasion is complete and tear your enemy from the inside out. <~~~~I love this strategy it works all the time for me and is pisses my enemy all the time. It can work for comps too:)

CreepColony's Opinion: Bringing high templars to psi storm can really help.