Leara

Do not just make carriers and expect to survive, I personally produced void rays, colossus/immortals and Zealots to deal with a major brunt of the forces, and with spare resources I made 1 or 2 carriers every so often as backup.

Don't waste your money on cannons, this even goes for multiplayer, because a mobile force is far more deadly than a bunch of weak immobile cannons.

I just kept going till around 3800 kills on Normal, then destroyed my stuff to end it.

The key is not to overextend yourself, if you can't hold the outer base, then retreat in and patrol the two ramps to prevent access.

Oh *slaps* its Leara D:

Oh snaps its Leara

I'm poked and stalked =o

/pokes Leara o.o /waves

o.o
/stalks