Best role in my group?

[Yahn]

Hi! I am a level 34 bard that plays with 3 other friends, a shaman, a rogue, and a monk (we have a high level druid and ench for buffs). Would it be better for me to be buffing attack speed/regen and dotting, or would it be strong to charm/feat like I was soloing and have them assist?

Just curious what role would be fastest and/or most beneficial for me to fill in my group. Thanks!!