how can i calculate my total dodge bonuses


Rules Questions


If i have

1. avoidance feat : AC 1 to dodge
2. haste buff : AC 1 to dodge
3. combat expertise : AC 2 to dodge
4. magic item : AC 1 to dodge

how can i calculate my total dodge bonuses? listed bonuses all sum?


All dodge bonuses always stack (sum). It's one of the exceptions to the "bonuses of the same type do not stack" rule, along with racial and circumstance bonuses.

Oh, one exception: two bonuses with essentially the same source will not stack even if they're dodge bonuses. So if two different people cast haste on you, you only get +1 AC out of it, not +2.


Fuzzy-Wuzzy wrote:
Oh, one exception: two bonuses with essentially the same source will not stack even if they're dodge bonuses.

Wrong! Dodge bonuses from the same source do stack. The "same source" thing is only for untyped bonuses.

Note that spells have their own rules for stacking: "Spells that provide bonuses or penalties on attack rolls, damage rolls, saving throws, and other attributes usually do not stack with themselves." CRB pg. 208 - this rule doesn't even care about bonus types, two Haste spells simply don't do more than one Haste spell, period.


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Derklord wrote:
Fuzzy-Wuzzy wrote:
Oh, one exception: two bonuses with essentially the same source will not stack even if they're dodge bonuses.

Wrong! Dodge bonuses from the same source do stack. The "same source" thing is only for untyped bonuses.

Note that spells have their own rules for stacking: "Spells that provide bonuses or penalties on attack rolls, damage rolls, saving throws, and other attributes usually do not stack with themselves." CRB pg. 208 - this rule doesn't even care about bonus types, two Haste spells simply don't do more than one Haste spell, period.

Good thing there aren't any ioun stones that grant dodge bonuses to AC. That could get ugly fast.


Yes, the only things that I can remember are Outslug Style with one of the fairly rare options to make more than one 5-feet-step per round (and even than it's totally harmless to stack the AC bonus), and the thankfully core-only Rogue Talent Offensive Defense, which does produce utterly crazy AC bonuses. 10th level Rogue sneak attacking a flat footed target, with Sap Master, Improved TWF, and Haste? Yep, that's +50 AC if all attacks hit.

On a related note, the Emboldening Strike Rogue Talent, which can be selected on unRogue, also stacks, because circumstance bonuses have the same issue. I'll let everyone decide themself whether improving the highly conditional, after-start-of-combat-only save bonus on the class(es) with the weakest base save a PC class can possibly have is a bad thing or not (hint: it's not). Likewise, a cRogue who can sometimes increase their AC to crazy amounts is still crap.

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