Q174: Assuming feats and UMD aren't available (that is, the Druid can't UMD - other characters in the party can though), which means exist for a Druid to improve his Spot-check (this particular Druid is level 15)? I've reached +41 with a combination of basic Wisdom (starting at 19, all level-ups and +6 item; not enough money for inherents yet so stuck with 28), Owl's Insight (+8; the only permanent CL buff I've got is Orange Prism Ioun Stone and I can't exactly afford enough Beads of Karma to use it every time I cast the spell), +10 competence from Third Eye Aware (not using custom items) and 18 ranks. I can get Alertness by being next to my AC.
That would put me at 18+9+4+10+2 = +43. I'd like to at least be able to locate still, unliving invisible objects (DC 60) and if possible, beat the "Pierce Illusions"-threshold of 80. The only thing I can think of is some Insight-bonus, but Moment of Prescience doesn't appear on Druid-list and it's Personal-only. Same with Divine Insight and Guidance of the Avatar. I have access to Extraordinary Wildshape-spell (from the standard list) if that's of any good; I can't think of forms with massive Spot-bonuses though.
Q175: Any good Wildshape forms for Extraordinary Wildshape in general detection-abilities wise? Blindsight is easily acquirable through a spell, so I'm looking for something more obscure/efficient. This one mostly from MM1; I can think of Grimlocks, but that's about it.