Am I playing BARD correctly?

[Luso]

200 TP is alot to put it in a rotation, I'd rather do it depending on the TARGET's skills rotation, i.e Titan's Mountain Burst / Tumult.

When I mean rotation I didn't mean spamming it in a predetermined order.

You are right, people are supposed to adapt to battles (that is why I personally would recommend avoiding a 1 button macro). Rotations should change depending on the fights. Bards have lots of abilities that can be prioritized before certain attacks that can make a difference. While it is 200tp, there can be multiple bards in the party that can take turns keeping the debuff up.

-10% damage helps in a lot of battles especially when bosses place debuffs on tanks. Support the group, TP manage, and dps. A good bard will realize the ideal times for all of his/her abilities.