What ways are there of boosting Court Bard's Satire ability?

[Silas Hawkwinter]

I'm interested by anything that can increase the penalties imposed by the Satire ability of the Court Bard.

I'm aware of Three Reasons to Live is there anything else? Most of the usual suspects for bard optimisation (e.g. Banner of the Ancient Kings, Master & Grand Mater Performer) only affect inspire courage.

[Temperans]

The ability focus monster feat and similar.