Maximizing Savor Cashback and VX points

I have a pretty simple setup.

1. Amex Gold for dining and groceries (and anything where the Rakuten multiplier beats C1 portal)
2. Savor for streaming, entertainment, and restaurants that don’t take Amex (I travel abroad frequently)
3. VX for travel and everything else

I have been converting the Savor cash back to points with VentureX. I think it works out to earning more points than using the VX right?

Say concert tickets were $300, I’d get $9 back which converts to 900 points vs if I’d used VX I’d end up with 600 points ($6).

Am I doing that math right? Is there a better use of the cash back? Is the purchase eraser a better use?