persistence on a pool used in a route

I have an F5 configuration where some VIPs are fiddle with by an iRule and then load balanced across their own pools, others are fiddled with an iRule and then sent to a proxy pool. The complication is that, traffic to the load balanced pool servers is routed through the same proxy pool that the second iRule sends traffic to.

 

 

Is there a way to cause persistence for the proxy pool regardless of whether the traffic is sent directly to it by the iRule or routed through it due to a static route pointing at the proxy pool?

 

 

I've looked at creating a persist profile with "across virtuals" which seemed the obvious approach, but there doesn't seem to be a way to assign persistence to the routed traffic.