1. When I got crystal it was around 70 wins with 54.7% winrate, dunno what it's now.

2. Played WHM from Unranked to Gold, SCH from Gold to mid Plat, then a mix of SCH and BRD to Crystal (and still play them in Crystal).

3. Haven't seen a single GNB or RPR (there's been 2 Dia RPR though). Very few DNC, BLM, DRK. Some PLD and MNK. Rest are plenty.