The only thing I agree with here is buff duration. Shockspikes can be short, as well as Stoneskin, but Protect and Shell should definitely last at least 20 mins, if not longer. What was it in XI, 30 mins? That seems reasonable to me as well, it gets very annoying having to constantly recast and I have a feeling that melee players would be much more willing to "gather together" for buffs if they only had to do it ever 30 mins or so. I know when I ranked up my melee jobs, I got very annoyed, almost as annoyed as the mage is, of constantly having to get new buffs. So def on Pro and Shell getting longer duration. Everything else is fine I think.