DQ3 Advice

I’m currently playing the remake and went with a classic style party made up of Warrior, Thief, and Priest.

Now that I’m pretty far in (everyone is around level 25) I’m kind of wishing I had picked a monster wrangler and also maybe merchant. I just chose these bc it was my first time playing and didn’t want to wall myself.

Is it worth picking up a MW or Merchant now? Or better to maybe wait for the multiclassing stuff at the Abbey?

I’m new to multi class systems so I don’t fully understand the best way to go about it. Thanks!