A magic-user who acquires a durocib as a familiar can receive all the sensory information the creature gathers, through a telepathic link that has a range of 12". The master also gains an 18 dexterity and a bonus of +1 on all saving throws.
Monkeys come in various collectives, and I like "troop" for this organization.
CR 2.
10 lb, and the rest looks good.
Personally, I think the empathic link (and later, scry on familiar), improved evasion, etc, probably are enough. I suppose these could be "special" benefits like normal familiars grant, but none of the improved familiars have those as far as I know.
I agree. How about a +2 bonus on two skills, say Hide and Move Silently?