Archer classes get a Sleep skill at lvl20. The Stormguard is pretty insane, imo. It has a long range Charge skill on like a 10sec cooldown (love it), its main class buffs the speed of its main resource builder and increases the amount of resource skills give. Once its class buffs are up, its like a blender, 2 interrupts, good AoE skills. Fun!
Have my Bard up to 21 (played a Bard to 34 on the Thailand server...but the bad translation made it painful), and its alright. Takes a bit too much work to get its class buff up to max by using Songs, though its not soo bad once you get a Song that is also an attack, switched over to Huntress.
Fyi, at lvl20 you can dual-spec and switch between the classes at anytime, and have the same amount of talent points for each class.
I didn't like the Rogue class much, mainly due to the stupid looking weapons, lol. The warrior felt really, really slow compared to the Stormguard spam. Sorceress is a fun class, also has the best "dodge" skill (a teleport).
Looks like you won't need Tickets for any of the Solo dungeons which go up to lvl57, and only the lvl60 party dungeons will need Tickets to reset (party dungeons don't open up til lvl35).