Protection is looking good!:
Rating Damage DR Rat/%
249 12,194 0,00%
315 11,848 2,85% 23,2
454 11,382 6,66% 30,8
648 10,733 11,98% 33,3
714 10,556 13,44% 34,6
Amount of Rating needed to reduce damage by 1% is between 23 and 35 in this sample, it starting at 249 instead of 0 is messing with the "cost" so to say. It's going to decrease in efficiency slower and slower though.
Protection is looking very hot right now, bad thing it ofcourse can't proc anything like the other stats, AND you have to know what you're up against. But it prevents burst much better than all other defensive stats.
Lets compare it to the DR you get from stacking mitigation. NB Theese numbers ignore enemy penetration and critical hits.
Protection is better than even evade, but it reduces every hit (of EITHER magical or physical), also it doesn't reduce penetration damage.
Proc Cost Rating needed for 1% DR
Block 39,88 33 82,75
Glance 74 44 59,46
Evade 142 66 46,48
(How I do this, let 1 kind of mob hit me for around 3k times per rating. Then remove glancing, blocks, crits and penetrates. Comparing only average normal damage over 2k ish hits per rating to eachother. Also make sure I remove RNG where at all possible)
Thanks to Rekreant, who's been very persistent in claiming that prot is good even though everyone else said it sucks.