The thing is, you'll want more wisdom, anyway. Scrap Rapid Shot and take a Fighter level after Factotum 11. OR get an eternal wand of heroics for two feats/day (this may or may not fly with your DM, IIRC opinions vary on whether you can use heroics twice).
The idea is, of course, to sacrifice a small amount of power now for a lot more power, later.
Take a dip of Paragnostic Apostle (on your archivist side) (hopefully reflavoured) and get the Travel Domain, swap for Travel Devotion. IIRC PA can get any domain, even those not offered by your deity.
In the end, you can get Owls Insight, and with a single level dip of Hierophant of course persist it (Divine Reach).
Also, I recommend not being good and getting a Persistent Greater Consumptive Field for the fat CL and Str.
You can double your persists if you stack on Extend (of course in the most beneficial order) for 48 hour durations.
And finally, shapechange (or Fiendform/Fiendish Transformation+Polymorph, if you can) to an Arrow Demon.
Of course, by that time if you stand in the sun for too long you'll drown everybody in gouda...