The standard campaign is sooo easy

Well I think there are several things to keep in mind:
_ may seems stupid to say but shortkeys rules and are essential for surviving. Just ask the ladder champions themselves on Bnet

_ concerning the protoss last mission, I don't see major difficulties. Actually it's even an advantage playing 2 sides. You can combine a armada of 24 siege tanks in alterned formation, plus archons and scouts and Bcruisers for support. A tip:
ALL Zerg units are extremely vulnerable to irradiate. And of course psionic storm. Just watch out for the defilers and their damn plague, and the queens with their broodling. So protect the sieg tanks with archons far in front of them, then scouts to prevent queens. Archons will stop scourges, while the tanks will wipe out from far, the hydralisk and other light infantry (hydralisk, zergling...)
Use yamato to progressively destroy the colonies. Another thing is to hit and run. When you attack a place, destroy one or 2 building then run and attack another place. AI will get all its units to the previously attacked spot so you can do that as many time as you like

_ Terran campain: nuke + yamato. No other word. Destroy progressively the turrets using yamato. One single shots is sufficient.
Anything else?
