Oops, lol.
I think if you’re not bogged down by it, like how I was with DRR2, it will be a great holistic booster to your foundation. As the description says, it will make every other sub in the future easier to use. That means it’s also good to ease what’s currently in your stack.
In my opinion, unless you have a really hard time with the sub, I can’t see a reason to run it solo. As I said, it’s a great booster once you’re done with the major recon that holds you back, if any. Its effects on the other subs in the stack are so good that I think it’s a bit of a waste not to stack anything with it.