Dunno, this familiar makes you look for specific hats, depending on the effects you are looking for. Hats you wouldn't otherwise bother farming.
Regarding stats, you'd need to get a bum cheek (5lbs), asshat (7lbs), barskin hat (13lbs), dragging balls hat (25lbs)...
And since familiar buffs don't seem to work, you would be losing out a lot. Of course, it all comes down to how much you value stat gains (I value them highly).