Current arsenal is a Proton at the top, 2 Gravity Evolves below that, a RG Hyper Cell Fused, an RG MVP, and an X-Factor Deuce from 2003 when they get really toasted.

But I'm looking for a weaker solid or hybrid to go underneath my 2 Gravity Evolves with a bit of an earlier, smoother motion than I get from HCF.

The Maxx or HB Intensity are two I'm looking at right now, but I'm open to any suggestions.

I think the Phaze II fits what you're looking for. Rubicon should fit in theory but it's probably stronger than the Evolve and definitely above the Fused.