RHP's are a great way to heat the cage and have a hot spot. It may not work for you, but there are plenty of others it does work for.
Not only do they create a hot spot, they create ambient temps within the cage that can't be obtained with belly heat alone. You must have fairly tolerant household members, because my family would be rather pissy if we had our home at temps over 70-71 degrees year round.
This guy uses AP T-25's and RHPs for all his larger retics and burns.
https://www.youtube.com/watch?v=zPMlSFjQYZ0&t=926s
His biggest snakes are in the Biggest AP units you can buy.
There are many ways to do things, and many different approaches to caging and setups.
So "Belly heat all the way" isn't for everybody, nor are my naturalistic setups, or another person's tub/rack setups.
People that have been doing this for a while usually have a system they are comfortable with.
I like your setups, actually a lot, but they'd never work here.
Are you sticking with the T-25's for the largest cages Sauzo? I wish they were 24" tall and I'd grab one, but they charge for the $625 T-30 model to do it, and then add delivery. No can do here. I never heard from Matt I was going to visit yesterday, but Ed has me down for a sweet double cage.
Is Caesar a year old tomorrow?