Well, all the social Lunar charms are a little hard to cover. But basically, they have fascination, emotional manipulation, intimacy manipulation, charms to keep people from noticing them. These, coupled with the ability to shapeshift can be quite useful. A fairly easy charm setup for social Lunars is Appearance 5, Third Appearance Excellency and the charm Perfect Symmetry.
The latter doubles the MDV bonuses you get against someone for having higher Appearance, or doubles the MDV penalty you inflict on them. Meaning, if you have Appearance 5 and the target has Appearance 1, you normally would only get +3 bonus since that's where it caps, but the charm would let you get +4, up to +6.
So if your Appearance is 5 and you use the Third Appearance Excellency while Perfect Symmetry is active, your Appearance becomes 10 and you get +6 MDV against anyone whose Appearance is 4 or below, or +5 MDV if their appearance if 5, which is everyone who has Essence 5 or below. Only for one instant, though, since that's how long the excellency lasts, but it's good for one attack or defense.
And all it takes is, yeah, two charms.