Nice. So a Half-Elf with Improved Improvisation and Evangelist PrC can attain +10 to all untrained skillchecks and roll all skills untrained, before factoring in things like Heroism and Tears to Wine. I suppose if you worship
Magdh, you also get +4 to all int-based skillchecks (and you can use Fey Obedience as if it were Deific Obedience for
Evangelist,
Exalted, and
Sentinel PrCs, according to the sourcebook Fey Obedience comes from). Evangelist PrC is usually easiest as a pickup on regular (non-Unchained) Monks (or used to advance PrCs that advance regular Monk, like
Student of Perfection,
Champion of Irori, or
Brother of the Seal) since advancing Flurry of Blows basically gives you full BAB aside from the first level, but you could apply it to a lot of classes.
Tbh Knowledge skill optimization in particular seems a bit easy.