In your mining software ...
Yes, we already had this in the two posts obove.. but why running additional proxys if this job is wanted for not just one pool. And (by the way) in this case the proxy is part of the mining software as the miner itself has no option for stratum (but backup pools ...).
Just wanted to clarify, I did not ready read your question completely. I apologize. My example was for say running a couple BAMT rigs using phoenix getwork, pointed to a couple backup Stratum Pools. Otherwise yes, as Kano said, for just a FPGA, just add the backup pool in the mining software.