I don't put anything on mine, RTV will tend to squeeze the gasket out and it just makes a mess. Mopar didn't use anything on the gasket why should you?
Humm... I never have a problem using RTV but then again I don't go crazy like alot of guys do. I just put a real think coat of it on both sides of the gasket and I've never had it push the gasket out. Alot of times they will seep if you don't use sealer so that's why I use it. JMO