you have some option :
1. Katar/anysubclass >> Good self Buff, self Healing, Good with High Critical (LOL i hear that heal can crit)
2. Duelist/Katar or ranged subclass >> i am example of Duelist/Grenadier, but playing duelist to solo PvE is tricky LOL.
3. Guardian/Bard >> Dont ask me about this TANK.
but i recommend you with Katar, Guardian/Bard is a good Tank, but tey not as hurt as Katar. katar can deal a high damage too, but of course Duelist can deal more huge damage when facing the boss.
how about the other opinion ?