Hi 1st off I would loved to say after lot of testing from my personal experience 0/40/31 is the best so far even after nerf. I used like 200g now trying every spec in raids and At least for me it seems the best though didn't had gr8 glypths when tries afflition.
After that I never used lifetap glypth or 4 parts mainly cause could not find the dam thing and had gr8 other parts except tire and for now i have 2t8 bonous finally so not going to even bother about it. So far using Immorlate, Conflagrate , IMP but I will upgr8 to Incenerate i would think. Imp give like 120-150DPS depending atm for me from what i can see.
Also has anyone figured how gr8 the 2 t8 bonus is for 0/40/31 spec by any chance ? specially with 2t7 one? They seems to give so much dam +hit from t8 gloves+ chest i had to take all the +hit gearaway and that meant removing Leggings of the wanton spell caster for Hood of rationality as the only offset part.(got t8.5 chest+t8 gloves)
Here is my armory btw
The World of Warcraft Armory