Arguments for monitor timeout set to 3 times interval

I'm using a bashscript to check internet availability via two bluecoat proxies, my concern is reducing the interval will increase CPU usage on the F5 and also the additional overhead on the firewalls and bluecoats. The other problem is they would like this one particular app to always use the same proxy. To get around this I've created another Pool and increased the prioirty on one of the Pool members.

 

Would it be possible to use an i-rule for this particular app which would simpy state traffic from source x.x.x.x always use Pool member A unless it becomes unavailable. if I could do this I wouldn't need two seperate Pools so could then reduce the monitor interval?

 

 

Many Thanks

 

Darren