Holt warden is incompatible with Church inquisitor. Alignment.
Church inquisitor requires lawful good or lawful neutral and holt warden requires any neutral, so lawful neutral should be fine.
Don't have access to LoM or RoS, and thus couldn't check prereqs for some of those
Earth dreamer requires knowledge (nature) 5 ranks, spellcraft 10 ranks, earth sense, and the ability to cast 1st level spells. Earth sense is a feat that requires con 13, wis 13, and not having the air or aquatic subtypes. It's not very useful by itself, giving the ability to detect, but not pinpoint, creatures touching the ground as a move action.
Keeper of the Cerulean Sign requires not having the aberration type, gather information 5 ranks, knowledge (arcana) 8 ranks, knowledge (dungeoneering) 8 ranks, sense motive 5 ranks, aberration banemagic, and craft wondrous item. You also have to craft a cerulean sign, which costs you 2,000 gp and 160 xp. Aberration bane magic is a feat with no prerequisites that makes you spells automatically deal +2d6 damage to aberrations, so not overly useful.