I did some test to verify old data because I'm writing guide for Pillars of Eternity (but it's in my native language). I will share results of optional means for increasing spells damage (via DR bypass talents): PENETRATING SHOT Chanter: Seven Nights She Waited While the White Winds Wept (3), So Singt thy Biting Winds o' Eld Nary (4) Cipher: Mind Blades (2), Mind Lance (4) Druid: Stag's Horn (3), Overwhelming Wave (4), Firebug (5), Avenging Storm (8), Tornado (8) Priest: