Does tenacity stack?

[quote=theBMB]ya I imagine there's some weird math invovled with champions who have built in tenacity, [[irelia]] and [[Dr. Mundo]] to be precise[/quote]

[quote=Crows foot][quote=th3BlackAngel] Yeah, I think that was what I was talking about. [/quote] It's always good to know what you're talking about ;)[/quote]

[quote=VoiD]Ima try to make this as most complicated it can get. It doesn't stack, 1 tenacity = 1% cc reduction.[/quote]

[quote=Jebus McAzn][quote=theBMB] ya I imagine there's some weird math invovled with champions who have built in tenacity, [[irelia]] and [[Dr. Mundo]] to be precise [/quote] Tenacity stacks multiplicatively with CC reduction from champion abilities such as [[Ionian Fervor]], [[Burning Agony]], or [[Insanity Potion]]. It does not stack with other Tenacity sources.[/quote]

[quote=JunSupport]Tenacity does stack with [[Ionian Fervor]], [[Burning Agony]], [[Insanity Potion]], and [[Cleanse]]. However, it stacks multiplicatively. So it's not a flat 35 + 30 or something like that. The effect is slightly reduced the same way Magic Penetration ends up with 49% if you combine [[Archaic Knowledge]] and [[Void Staff]] If the math is exactly the same, you just take the lower value and multiply it by the other half of 100% that the higher value is subtracted from. i.e.: Ionian Fervor - 40 tenacity w/ 3 targets. (0.4) Mercury's Treads - 35 tenacity (0.3) 1.0 - 0.4 = 0.6 0.6 x 0.35 = 0.21 0.21 + 0.4 = 0.61 -> Therefore, you'd have 61 Tenacity as [[Irelia]] while fighting 3 or more champions.[/quote]

[quote=Temzilla]An Irelia with Cleanse buff and Mercury Treads would have a 94% reduced CC time.[/quote]

[quote=Crows foot]Temz: scary! Especially since she just used Cleanse to get out of the first :P[/quote]

[quote=JunSupport]What kind of stupid Irelia would take [[Cleanse]] into a game when she already possesses Tenacity? Also, I do not know how Tenacity stacking interacts when it comes to 3 sources. My math only supports scenarios where there are 2 sources. My guess with 3 is that the lowest Tenacity source would be negated. So Irelia vs 3 enemies + Mercury's Treads and Cleanse would end up having only 79 Tenacity for Cleanse's 3 second duration or when the enemy numbers drop below 3 (which ever comes first).[/quote]

[quote=Queso][quote=JunSupport] What kind of stupid Irelia would take [[Cleanse]] into a game when she already possesses Tenacity? Also, I do not know how Tenacity stacking interacts when it comes to 3 sources. My math only supports scenarios where there are 2 sources. My guess with 3 is that the lowest Tenacity source would be negated. So Irelia vs 3 enemies + Mercury's Treads and Cleanse would end up having only 79 Tenacity for Cleanse's 3 second duration or when the enemy numbers drop below 3 (which ever comes first). [/quote] If we assume they still multiply. Cleanse is 65% reduction. Passive is 40% reduction. Mercs are 35% reduction. So>>> (100*.35*.6*.65) = 13.65 aka 100-13.65 = 86.35% CC reduction. The other Irelia example can be worked this way as well: Merc Treads + passive 100*0.65*0.6 = 39 100- 39 = 61% reduction in CC Where the 100 just represents the max percent of CC you take, and the 39 is the amount you'll be taking with your 61% reduction.[/quote]

[quote=GoliathGTX]Tenacity of items doesn't stack and the system will take the highest tenacity value.[/quote]