I would not do cash and points ($75 plus 6,000 points) when you can get the room for $15 above what the cash portion would be ($90) and not have to surrender any points.

I value my points at a minimum of 1.5 cents, so 6,000 points, to me, is easily worth $90 in value or more at expensive properties, and often quite more than that. I would not trade them off to save $15.

The 3A rate is generally refundable if the rate drops to something lower before your arrival, so it does offer some flexibility. I was there last week on an $79 rate.