Should I take the rer to get to CDG or take a taxi?

I am about to leave Paris after a semester abroad and i’m curious to see how people think I should get to CDG. I’m currently living at the end of the ten line in Boulogne and it takes about an 1.5 hours to get to CDG through the ten line and the rer.

My flight leaves at 10:30am on this coming Wednesday. Should i take a taxi or the rer?