Im not 100% sure but i dont think hardeners have stacking penaltys either.

I just tested a proto rail with 1,2, and 3 damage mods a got these results (all on Shields):

No damage mod - 2074
1 damage mod - 2695
2 damage mods - 3398
3 damage mods - 3980

How did this flaw get past through the QA team?

Those numbers are what they would be if the stacking penalty was working. So are you saying you got different numbers?

He's right

2074 * 1.3 = 2695

Assuming no penalty for 2 mods
2074 * 1.3 * 1.3 = 3505 > 3398

If you were to go for that math then yeah, it's working. But what's really happening it's that the bonuses themselves do not diminish when affecting the original value (in this case 2074).

2074 * 1.30 = 2696 (forgot to mention that HP had omitted decimals so the value will be a little different on a calc, OP values still legit)
2074 * 1.60 = 3318
2074 * 1.90 = 3940

I may be wrong but values *should* be multiplicative.

Regardless something isn't working properly..

Are you talking about how similar the values are when correct to what they would be when added together with no penalty?
I can't think of a better way to explain that but If that's what you are talking about then it's just a quirk with the math. There's a few odd patterns you can find in the numbers when using percentages that are multiples of 15.


I think what isn't working is my ability to understand what's going on here.

Similar thing is also happening for dropsuits but not as bad as vehicles.

Allotek Plasma Cannon vs Shields - 1271
1 dmg mod 1397
2 dmg mod 1518
3 dmg mod 1605

In stacking effect it's working properly but if we were to treat it as something affecting original value we get this:

1 dmg mod - 1397/1271 = 1.0991 difference (again, HP decimals are ommited on in-game UI)
2 dmg mod - 1518/1271 = 1.1943 difference (if it was stacking penalty as some of us thought then it should've been 1.187)
3 dmg mod - 1605/1271 = 1.2628 difference

No, it wouldn't be 1.187.

( 1 + .1 ) * ( 1 + ( .1 * .87 ) = 1.1957

Just checked EVE and now I feel like an idiot -.-
Still, how is it ok for the dmg mods to hardly receive any real penalty? :l

The issue here is that since the stats across tiers does not increase, stacking and using multiple of the same items becomes overly powerful.
In my tests I have found that just stacking 2 or more damage mods is more effective than the hp lose from lack of tank. It is easy to take on 2-3 tanks at a time and walk away alive. Same goes for using multiple hardners at once. I have not yet been able to use a multi-hardened tank vs a damage mod tank yet, but believe that 3x damage mods would win over a 3x hardened tank.
These two scenarios creates a vacuum of fitting selection, as they are the only 2 viable ones left. IMPO, I think that activating a second mod of the same type should not add any extra stats, but rather just act as a time extension. Tanks should be tough and resilant, but these two fits give you a temporary "God Mode".