Spell Penetration

[Jacob Saltband]

Besides the 2 feats of spell penetration are there any other sources of spell penetration that stack with the feats?

[Kalmyel Stedwethren]

Being an elf?

[strayshift]

Yes, in that anything that increases your caster level increases your chances to overcome SR.

There is also Piercing Spell which lowers SR by 5 (Ultimate Magic)

[jumpydady]

oh and spell perfection... but it only applies to one single spell

[ZomB]

Single use item Dweomer's Essence gives you +5 for 500gp in the PFS Field Guide

[evolved]

Off the top of my head, the wonderous item 'Robe of the Archmagi' gives you +2.

Also anything that boosts your caster level, like the feat Varisian Tattoo, or the ioun stone that gives you +1 caster level.

(Also, there is a campaign trait from the APG (forget the name atm) that gives you +1 DC +1 caster level for 3 spells that you pick)

[Ximen Bao]

Co-operative casting is nifty with the new valet familiar archetype.