I'm not seeing where Intrigued by Thassilon trait provides any ability bonus. This is from Archives of Nethys site:
https://aonprd.com/TraitDisplay.aspx...by%20Thassilon
You gain Thassilonian as a bonus language, and at 1st level and every 2 levels thereafter, you gain a bonus skill rank that can only be applied to Knowledge (arcana), Knowledge (history), Linguistics, or Use Magic Device.
Once per adventure, you may either take 20 on a Use Magic Device check or activate a charged magic item without expending any charges.