HPIt seems Protection has been calculated to the best of our ablities as reducing roughly 1% of damage per point of protection (after armor reductions etc.)
So I started crunching some numers.
For the purposes of this discussion lets not factor in DM to the discussion as DM obviously makes the entire thread a moot point.
Also I am using pretty rough numbers for my calculations as there are no 100% exact numbers I could find for Protections exceeding 20.
My tank has (20) protection trained The unlearn is 595,695 exp meaning I have trained roughly 627k exp into Protection.
I got numbers from a character with (25) protection and his unlearn was roughly 1,329,174 meaning roughly 1.4mil trained.
It would cost me somewhere around 775k exp to add 5 points of protection netting somewhere around 5% damage reduction, OR 55k extra HP to one minion. I currently have 1 mil trained HP on my tank and 300k on my wall, and an AS that casts 625k for 4 minions.
Now just taking into account the 1mil hp on my tank (since he would be sacrificing HP to train Protection) That should allow him to live throught the equivalent of roughly 50k additional damage dealt. This almost offsets the HP he would have gained. Add in the 2.5mil plus HP the rest of the team gets from a full AS, and it seems that training protection would be the logical choice. Take into account that the majority of battles lost at this level leave the looser with 100's or k neagative HP, and the loss of 50k trained HP seems less drastic.
Aside from the OBVIOUS drawback of DM. It seems I am missing something here, so flame away.