Being a main Bard myself I have to be honest, from a pure DPS standpoint, it is easy. You can be mobile and still do damage, and the pressure is not on you to deal loads of damage because you aren't expected too. However, there is an aspect of Bard that sometimes gets overlooked. I was doing Ifrit HM the other day and both WHM started running out of MP and we wiped. Who do you think took the blame because he didn't pop up Mage's Ballad? This guy. While not entirely my fault that they weren't managing their MP, it still didn't make me look good. No doubt the DPS aspect is easy peasy. Just don't forget everything else with it.