Alrighty, it's the right mission this time. Ok, get gas asap. Build up your eco and about 4 tightly packed sunkens. Expand to the north but build two hatches(one near the minerals and one at your ramp then make sunkens there). Expand to the south as well as do the SAME thing(make 2 hatches and make sunkens by the ramp with overlords, of course). Make a few queens and start infesting karaku with parasite. These will give you vision. And they will warn you of incoming attacks well before they happen. You want to overload the pylon clusters as quickly as possible because blue will eventually start attacking you and with great force, too. Remeber that Duran has lockdown and the ability to consume. Each time you overload a pylon cluster, destroy all the surrounding buildings. A nice group of hydras, lurkers, overlords and Duran, of course. Lings(for Duran to consume couldn't hurt, either) Take out the 1st 3 on your side of the map(replace your losses each time). There's another resoucre node just left of the southernmost pylon cluster. Take it as soon as your ready to destroy the brown protoss base on the southweat corner of the map. With that destroyed, brown won't be much of a factor anymore. Defending your base from carriers can be hard without an air force of your own so you're gonna have to just use hydra/deflier. You can dodge storms with your hydras if you see temps approaching. Anyway, taking out the last 2 clusters should be a piece of pie, at this point.
The units I used were hydras, lurkers and defilers.(overlords for detection, of course) Ultras are nice. Upgrades=thx.
You may have to work on your speed. Otherwise what I just said won't help you that much.