Dragon Reborn stands alone excellently.
You really don’t need anything else to make it more effective.
I’ll even go so far as to make the following bold statement:
During your first run of Dragon Reborn you are unlikely to experience the full potential of what DR has to offer.
Your current capacity for healing and evolution is likely to reach its limits before the subliminal does. (Actually, the sub doesn’t even really have hard limits.)
In other words, your own current healing capacity and desire for transformation will probably be maxed out long before you reach the limits of what Dragon Reborn can do.
The cool thing is that running DR will lead to a continual broadening and increase in your healing and evolutionary capacity. So by the next time you run it, you can ride it even farther.
Kind of like how if you bought a 6-month gym membership, It’s unlikely that by the end of those 6 months you would be lifting the heaviest weights in the gym.
On the other hand, by 6 months in, you’ll probably be strong enough to make much better use of the equipment in that gym.
Long story short: you probably don’t need to worry about helping out Dragon Reborn.
You can combine programs if you want to though.
Just remember that the more programs that you play simultaneously is also the more time and internal resources that are needed to process all of them and to start seeing results. (That’s personal experience talking.)