Mostly keep it as it is, but get rid of --lookup-gap 2 and set --gpu-engine on the 290 to 1000.

Are you sure you want --failover-only? Without that setting it will only mine the first pool as long as it's up and working correctly. Setting --failover-only means that it will only switch when the pool fails completely, but stick with it if it's up but failing to feed work.