Hi there,
For me, I'm a level 80 wind breaker and from level 60 to 80, I've been training at Mp3. I hope it helps. :D.
However, I am curious of where WBs like us could train when we hit level 80. I've gone to a few guides and they said that when we hit this level, we need a priest or bishop with us because we practically can't survive with higher levelled monsters hitting us with 1k plus damage. I tried that and had a hard time to train. Anyone can give me their own suggestions? Thanks. :D