Unfortunately it's one of those things that have so many possible ways to get out of, but due to conditions probably only one was correct. I know they say keep a constant power and counter steer, but that only works for X conditions. Drift boys will say you should have countered and gunned it, but with the TCS on, it wouldn't have worked I imagine.
I had a lucky escape in the Zed last year where it was a left-right chicane type section or road and I was doing a constant 30mph, on turning left the rear end floated out, I came off the power and countered hard right, the rear end came around too far the other way, so had to counter left again, but by this time the car had slowed enough to gather it up and crawl on to the shop. That was caused by greasy roads and of course 30mph obviously being too fast in those particular conditions.
In different conditions on the same road keeping a constant throttle may have saved me, or maybe even flooring it, who knows, I just got lucky.