Setup is really personal, just try different things.
Also what works on one chassis doesn't always work on another.
One thing that does work on most if not all chassis are stiff shocks, the rear a little bit more then the front.

TC4's are perfect for drifting!
My previous drift chassis was a TC4 FT with eZrun 9t and 2s lipo's.
Didn't locked the diffs because i didn't like how it handled.. only tightened both diffs more then normal.
30wt asso oil in the shocks (Tamiya TRF shocks).
I think 0 camber on the front and -1 camber on the rear
Used this setup for over a year and really liked it, only switched because it needs a rebuild.

Tire choice is also personal and also depends on the surface.
With brushless i like HPI T-drifts and Tamiya Driftechs on most surfaces.

Never used an one-way in my TC4 but i use one in my Pro4 (Almost the same as TC4) only on circuits with tight bents.

Picture of my TC4:


A vid of me drifting with the TC4, not my best tho:
http://www.youtube.com/watch?v=fiCDA4C-gUA