[guineapig]

Once you are around 30 (maybe sooner) you can take a stab at the gnolls outside of Splitpaw while you're in SK

You can kite in Rathe Mountains starting at around level 34-36 depending on your comfort level. The killing will be slow still but the payoff is pretty good. At 38 with your second targeted drum-dot the speed of kills will be considerably better.

There is always competition there, this is true. However bards have some advantages:

Unlike the necros and mages there, bards have tracking so you know exactly when a mob has re-spawned and can outrun anyone to it.
And unlike druids, bards don't have to meditate between kills.

Oasis is a good spot for kiting specs around the same level but you will probably want a peggy cloak or some form of levitation to truly be effective there due to the steep cliffs and the water.

Although you can go there sooner, I don't recommend the Seafuries in OoT till 46 for a simple reason. You really need your third targeted dot in order to kill at a decent pace there (fire, ice and magic). I guess if you are purely using charm then this slow pace is somewhat negated but then you end up having to meditate eventually which a bard should never be doing. Like I said, you can try it sooner... but it's EXTREMELY slow going and you will be resisted a lot!