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**Takeishï**:

mmm... if it works, it means the trinity force build is more powerfull than I though.

Well, I just tested it.

__Vayne @ level 6 with Sheen attacking minions with 0 armor after penetration marks__
Base AD = 69.5

Standard Attack = 75 damage

Attack after Sheen proc from Tumble = 196 damage

Damage attributed to bonus from just Sheen = 69.5

Damage attributed to 65% Tumble bonus damage based on total AD = 48.75

Standard Attack + Sheen Proc + Tumble Bonus = 75 + 69.5 + 48.75 = 193.25

So...looks like you were right about Tumble not gaining the benefits of Sheen. In which case, I need to re-evaluate the analysis in the guide.

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By reaserching a little, I've heared some stuff about sheen/TF: can be ehanced by tumble, sheen/TF can crit, tumble can crit. With these information, here would be the formula with TF---

Tumble and Sheen/TF can crit, but they do not stack, based on live experiment with target @ 0 armor.

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{[base+(150% of base)]×1.75×2}

this formula is correct if the three statements above are true.

thoughts?

I think the correct damage formula is actually:

Total AD + Tumble proc + Sheen proc = Total unmitigated damage

Where Tumble proc is a percentage of Total AD without Sheen, and Sheen is simply 100% of champion's base AD at that level.