GungHo outlined two more classes in Ragnarok Odyssey. As you would expect, clerics are healers. You can restore HP for yourself and nearby party members by using Sanctuary. What you might not expect is Clerics can slap enemies with a giant glowing hand. With good timing you can defend and retaliate with a guard counter.
Hunters are ranged attackers that make arrows rain. Arrow Shower blasts targets with a wide shot while Arrow Storm drops arrows from the sky. Sharpshooting stuns monsters with a paralysis effect.
Players can change jobs at any time by visiting the Spectrolight Fragment in their room.