Every rogue will be taking Plagiarism. You need 35 points to do so:
2/5 Tunnel Drive
4/10 Coin Sap
For a sword/dagger rogue, you would also take 10/10 sword mastery, leaving you with 10 points.
This leaves your skill tree in an awkward state and the choices are too limited:
Tunnel Drive is still very slow, for someone focusing on stealth they would want to max this
Snatcher is fine on high-health mobs, but you could decide to max for farming
Coin Sap you could invest more for more reliable CC/less SP drain
Backstab is almost useless at this level for damage (the % after is nice), and you would want to max this (pretty thematic to dagger rogue!)
Raid while the only non-plagiarism area effect, is pretty useless due to SP cost, damage, and requirement of hide. This should be a choice to take.
Intimidate is a niche skill, this should be a choice to take.
Plagiarism is GREAT, but you need 10/10 to pick up preserve (required), even if you only copy a level 5 skill
Preserve is GREAT, 1/1, fantastic.
Skills you didn't take:
Compared to Storm Gust, Grand Cross, and several of the other top-tier thematic skills for other classes, this is too many pre-reqs.
For a bow rogue, you would also take 10/10 vultures eye and 10/10 double strafe, leaving you with 0 points.
Suggested goal: Rogues should have more DECISIONS for their points, not required pre-reqs.
Suggested methods to reach goal:
Remove or severely reduce the Tunnel Drive, Backstab, Raid, and Intimidate requirements from Plagiarism.
Reduce Plagiarism cost to 5/5