I have a Waterpik and also do oil pulling with coconut oil almost every day. Especially with the coconut oil the dentist noticed a difference in gum health even without me telling him.
Strangely, I've had one dentist tell me Glide floss is horrible and I should use some other floss that's "fluffy" (sorry, can't remember the brand/type, I think it was a J&J product), while more recent dentists give me Glide samples every time I visit. I tried that other dentist's recommended floss for a little while, but it was the absolute worst I tried in terms of tearing; it was basically unusable because it just kept getting ripped in half due to my tight contacts.