No, you do not need to set all Livewire devices to be a PTP clock slave. Some devices that aren't fully AES67 compliant can only accept Livewire clock.

What's important is any clocks are all synced together, somehow, so they both have the same reference.

This document describes background information useful for the integration of Livewire+ AES67 devices with Dante* devices running in AES67 compatibility mode.

It is important to note that the Telos Alliance is not a Dante partner, and our products do not support Dante natively. However, Dante has some support for AES67. We believe AES67 will continue to see wide adoption and support in the broadcast audio space.