I had some trouble with this (post NXOE achievement issue, unlocking 22 achievements in the same sessions, so I know prior attempts were not due to XBL issues.
I got the following talents, last minute, with extra points, but you may have them already:
- Dodge Counter
- Dodge Kill
- Dodge Kill Mastery
This video shows how it should look (the last two kills at the end, though only 1 is needed):
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