The Brawler gets an AC Bonus at 4 levels: 4, 9, 13 and 18
The strangler archetype says it replaces the AC Bonus. Exact wording posted below.
What I am not sure of is does it replace all 4 AC bonuses? Or just one at 9th level?
Is there a place in the rules that would clarify this better?
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Practiced Strangler (Ex)
At 2nd level, when a strangler has the grappled condition, she does not take a –4 penalty to Dexterity and does not lose her Dexterity bonus to AC. At 9th level, a grappling or grappled strangler still threatens an area and is still able to make attacks of opportunity while grappling or grappled; when pinned, she is not denied her Dexterity bonus and does not take a –4 penalty to Armor Class.
This ability replaces AC bonus.
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Thank you