So i want to do a single past life of druid on my main. As my toon will then end back up as wf arti i have gathered a silly amount of nifty docents over my past lives. Planning to do pure druid, wolf focused. I dont own monk so its a no go. My tr buddy group has for this life cycle 2 trappers and id rather take the +1/2 dc over the evasion. Since this life wont see more than 18 levels (after cap, tr) i was thinking of taking a wf body feat instead of one natural fighting. Since i wont be doing build with evasion i might aswell take adamantine body instead of mithral. By wiki in forms you dont get wf healing penalties. But before i do that id like to know:

Does the body feat have effect on druid?
Do you get the extra armor in forms? How does it work with bear form?
Does it have effect on spells such as arcane spell failure or monk like center losing?
Are all docents usable or is it similar to shields that you have to pack specific type. Most of my docents are gems by type. Has it any effect?