QUOTE(kjeron @ Apr 27 2012, 14:53)

I know, but what I'm seeing is double(+100%) the amount my armor's provide, not +25%.
Example:
My Mitigation is going from:
(1 - head) * (1 - body) * (1 - hand) * (1 - legs) * (1 - feet) * (1 - aura) * (1 - str*.004) * (1 - end*.007)
to approximately this with Protection:
(1 - 2*head) * (1 - 2*body) * (1 - 2*hand) * (1 - 2*legs) * (1 - 2*feet) * (1 - aura) * (1 - str*.004) * (1 - end*.007)
Going to have to agree with you, except for your math.
Did my test against Liselotte Werckmeister, got to love the little scamp.
In my light set, I have 25.2% mitigation from gear, and 54.4% mitigation with auras and stats. With the spell protection I took ~74% of the damage I would normally take. which is 1-.252=0.748. And considering that damage gets rounded it is close enough.
In my Protection hybrid set (just my highest mitigation gears) and had 38.4% mitigation from gear, and 63.8% with stats and auras combined with that. With protection I took ~61% of the damage I took without it. 1-0.384=0.618, which again is close enough with rounding.
Therefore the spell Protection is currently giving you 2x the mitigation from gear, not 0.25.
Formulas:
Normal:
Mitigation = 1 - (1 - shield) * (1 - head) * (1 - body) * (1 - hand) * (1 - legs) * (1 - feet) * (1 - aura) * (1 - str*.004) * (1 - end*.007)
With Protection
Mitigation with Protection = 1- (1 - shield) * (1 - head) * (1 - body) * (1 - hand) * (1 - legs) * (1 - feet) * (1 - shield) * (1 - head) * (1 - body) * (1 - hand) * (1 - legs) * (1 - feet) * (1 - aura) * (1 - str*.004) * (1 - end*.007)
Or to simplify
gearmit = 1 - (1 - shield) * (1 - head) * (1 - body) * (1 - hand) * (1 - legs) * (1 - feet)
and
Mitigation with Protection = 1- (1 - gearmit) * (1 - gearmit)* (1 - aura) * (1 - str*.004) * (1 - end*.007)
ex 5 pieces with 10% mitigation, and no str/end/aura
Mitigation = 1 - (1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1) = 40.95%
gearmit = 1 - (1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1) = 40.95% (equal in this case to Mitigation because of no str/end/aura)
w/Protection = 1 - (1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1)*(1-.1) = 65.13%
or it is about = 1 - (1-.4095)*(1-.4095) = 65.13%
100*(1-.4095)=~59.05
100*(1-.6513)=~34.87
34.87/59.05=0.5905
1-0.5905=0.4094 => 40.94% less damage
if protection was 1/4 like advertised
1 - (1-.4095)*(1-.4095/4) = 47.00%
100*(1-.47)=53
53/59.05=.8975
1-.8975=0.1025 => 10.25% ~= 40.95/4=10.24%
So the question is, working as intended? Or is the spell broken...
@kjeron this is where I argue with your approximation
1 - (1-.2)*(1-.2)*(1-.2)*(1-.2)*(1-.2) =/= 1 - (1-.4095)*(1-.4095)
67.232 =/= 65.13, and that much of a difference is noticeable against monsters of my level with doing damage testing
This post has been edited by skillchip: Apr 27 2012, 23:44