Proxy communication in dual stack

I am working in dual stack SAP PI.

I have a Proxy to SOAP scenario.

I have created two RFC Destinations.

RFC Destination Type G, SAP_PROXY_ESR with path prefix /rep

RFC Destination Type H, PI_AEX with path prefix /sap/xi/engine?type=entry

now in ID, I have Integrated Configuration which by passes the ABAP stack and also I have the Receiver Determination, INterface Determinatiin, Receiver agreement and sender agreement for the old ABAP stack

Now when I use Proxy, can I use sender SOAP channel with XI protocol like in Java stack.

Or should I not use any comminication channel like the old XI/PI configurations

qhich is better approach