I agree with the other posters - use both. Having a Scholar around lets the WHM focus on just the tank(s). Having a bard pumping mana up makes things even better.

The game isn't about just one class/job and what it can do, it is about using all the classes/jobs effectively together.

That being said, I'm seeing a lot of Scholars who don't have at least THM26 or CNJ34, and I'm sorry, but they are gimping themselves into what could be possible. There is a reason SE gave us cross class abilities, and people need to be able to use them. Swiftcast? Stoneskin? Come on....get there!