I think you already have the instructions about UIDropDownMenu in case not: Link
Today i was in a group (consisting of Blood-DK, Dis-Priest, Ret-Pala, Hunter, and myself - Arcane Mage)
I got this message:
I used ZOMGBuffs r183AceTimer-3.0: Warning: The addon/module 'ZOMGSelfBuffs' has 638 live timers. Surely that's not intended?
I had no lagging problems or stuff like this.
ZOMGBuffs used 450kb ram and ACE3 2,72 mb Ram