Dual purpse classes/jobs

[Frein]

I guess I could give that a try, though if it plays like /focus or defensive targets we run into the issue of having to have a pre-assigned target.

It doesn't. You use Holy Succor -> click on party memeber. And you're done!

Also, I actually almost exclusively use the keyboard when on melee jobs and switch to full-time mouse + kb for ranged and healing. It's amazing how much the UI forces you to change your settings and the way you play if you want to maximize effectiveness for different jobs.