Need Footers for Amps on Isolation Platforms?

I had been use Stillpoints Ultra SS under my Cary DMS-600 with good effect to increase detail and resolution, but there also could be negative effects introduced such as a bit of hardness in the treble. I decided to try the Ultra 6's and wow, they are amazing - all the benefits, but without downsides - just a smooth, relaxed, musical sound. I currently have my Pass monoblocks a mid-level rack, but would love to move them to isolation platforms closer to the speakers. For the price of the 6's I could get into something like an HRS platform. If I put my amps on an HRS platform, would that obviate the need for footers? If I would still need to buy 6 more Ultra 6's, I would probably just keep them on the existing rack. Would love to hear from folks!