Personally, cleric as a sub is a WASTE OF SP. You do not need cleric to survive as a bard while grinding. You just need to know exactly what you are doing at the time in which you need to do it.
But if you like cleric as well and don't mind the sp crunch, go ahead.
Here is my current skill bard.

As a Pure Bard, you have to familiarize yourself with every skill and how to use each. It's very fun AND CHALLENGING!