Why not play all three? Between the three, I would start the season with barb. It has the perfect set to start a season. You also need to find ambo’s pride and band of might as soon as you get the free set, in order to play comfortably in T16 and start farming GRs. Wizard is probably the best out of these 3 if we are talking GR potential, but the crusader is probably the fastest and easiest to play. Barb is probably somewhere in the middle but it is very tanky.