I may be wrong here but it should be as follows:

1st - 100% effect
2nd - 87% effect
3rd - 57% effect
4th - 28% effect
5th - 10.5% effect (not sure you can fit 5th anyway on any suit)

That's what I thought for the longest of time but that doesn't appear to be correct.

Im fairly sure that the effectiveness of a mod is halved for each additional mod you use. So for complex damage mods the base bonus is 10% the second mod will be 5% and the third would be 2.5% etc. So if you fit two complex damage mods on a suit you would be getting a 15% bonus to the damage of a gun.

What is ever in this game?

I may be wrong here but it should be as follows:

1st - 100% effect
2nd - 87% effect
3rd - 57% effect
4th - 28% effect
5th - 10.5% effect (not sure you can fit 5th anyway on any suit)

What is ever in this game?


Is that for damage mods only because that is not the case for other modules?

yeah with modules (Example Shield amplifiers)
it seems to drop down to 7.82% then (if my memory is correct) somewhere down to almost 3%. Again I'm not sure about the third penalty but the second one is only 7.82% efficient.

while with my armor resistant plates (which I have some skills for which gives me 4% inherently) it doesn't follow the same equation as the first one.

I'm missing something here, there must be hidden values that CCP doesn't show in the game.

S(n) = 0.5^[((n-1) / 2.22292081) ^2]

n = the nth module added S = stacking effect for this particular module addition

as follows:

11
20.869119981
30.570583143
40.282955153
50.105992649
60.029991166
70.006410183


However, in the example of complex damage mods, they are calculated in the following way:

Base Damage*(1 + (0.1*1))*(1+(0.1*0.869119981))*(1+(0.1*0.570583143))*(1+(0.1+0.282955153))*(1+(0.1*0.105992649)) etc.

This seemed to yield correct stacking figures for my calculations, even though it does not mean that the second module has ~87% effectiveness, the third has ~57% effectiveness etc.

If this were the case, the equation would be:

Base Damage*(1 + ((0.1*1)+(0.1*0.869119981)+(0.1*0.570583143)+(0.1*0.282955153)+(0.1*0.105992649))), which it does not seem to be.

So where do your passive skills come into play?

Lets say I have 15% to damage as well as three damage mods.

Is the 15% added to the product of the equation below?

Didn't read the thread but here you go. The exact numbers:

Stacking Penalties

1st mod: 100.0% effectiveness
2nd mod: 86.9% effectiveness
3rd mod: 57.1% effectiveness
4th mod: 28.3% effectiveness-á
5th mod: 10.6% effectiveness
6th mod: 3.0% effectiveness

Also, the the mods stack, for example:

First mod 10% = 1.10

Second mod 86.7% = 1.19557 =/= 1.1869

[Edit>>> oops misplaced two decimals. Fixed now.

Loll ok I was wondering where you were getting such I high number from until I noticed it may just be the decimal point.

So where do your passive skills come into play?

Lets say I have 15% to damage as well as three damage mods.

Is the 15% added to the product of the equation above?

Assuming it's a 15% passive bonus, it's applied to the base damage before the mods. This is how you would add in proficiency skills. As follows:

(Base Damage*1.15)*(1 + (0.1*1))*(1+(0.1*0.869119981))*(1+(0.1*0.570583143))*(1+(0.1+0.282955153))*(1+(0.1*0.105992649))

Yeah I factored that in. I appreciate the assistance.

Thank you all by the way. Now all I can do is hope that these are the official numbers (which I'm fairly confident of) and I can put my mind to rest...for now.