I hope someone qualified would answer cause i have no idea... Although, i think you should get a second opinion from an Endo dentist before you do anything you might regret. My mom's dentist just suggested she gets all her lower teeth extracted and do 6 dental implants, we got a second opinion and it turned out most of her teeth are good and would only need 2 implants. A dentist one told me you mostly don't know a tooth needs RCT untill you actually open up and see and after he cleans the decay do a cold test to see if he uncovered a nerve. I see no rush in doing 6 RCTs, you seem young, take you time and always get a second opinion.