I played twenty PvP matches this morning, always taking the three trophy match.
Sixteen had BoneDragon in the enemy team. Wraith was in ten of these.
Three were Naga teams.
One was something else (bunch of green troops, Webspinner, Loyalty etc).
I won all twenty games... but the repetition is such that I don't really feel like doing more... or will need to go back to a one-troop defence, so the variety preserves my sanity, at the cost of a 30-40% drop in my gold income.