Honestly, since you asked I would say that you do yourself and the character a disservice by using Heyman for trash talk.

Paul Heyman has a pretty legendary cadence to him. One that is not easy to duplicate. The guy who handles the Heyman GM character does a pretty good job of it which I think does not do you any favors because then you have essentially two different types of Paul Heyman's running around here. One that sounds like Heyman and one that doesn't.

Since you posed the question I went back and read some of your work and one of the things I noticed is that outside of using some "Heymanisms" here and there, there wasn't a huge difference between the voice of Paul Heyman and the voice of Dolly Waters. I don't mean the actual sound but rather what and how they say what they do.

That is something I have struggled with in the past when I tried using a proxy to trash talk for a character. Trying to make sure that the proxy and the character don't sound too similar.

I also think that if you are going to go the route of using Heyman to trash talk then you need to go at it 100% and not have Dolly trash talk, ever. Otherwise it defeats the point. And since you've made it clear that you can, and will, and do a good job trash talking with Dolly, I think you would be better off just using her.

Plus, I think there is something comedic about watching/reading/listening to a young girl talking trash to grown ass men.

Just my two cents.