Does your whole rig freeze and you need to restart it? Or is it just the miner? You could try the watchdog script and see if that keeps your rig running. The script won’t fix the underlying problem, of course, but if it restarts the miner just 3-4 times each day, the few seconds you “lose” mining during the miner restart won’t add up to any significant time.
Link to watchdog thread: [CMD] FarmWatchBot (Autorun/Watchdog) for Ewbf, Claymore, Dstm, CCminer, Bminer, Ethminer, CastXMR, Phoenix, T-Rex, Gmnr, NB