In my mind, higher tension steel core/wound strings are the perfect excuse for low action. I've seen at least 4 pro DB players using Spiros with guitar-level and even mandolin-level action. If I were playing any kind of steel strings, they'd be as low as that. It would be the only way I could play them without hurting myself.
That said, I keep my gut-like fat low tension synthetic strings at E: 1/4" (~6.35mm) to G: 3/16" (~4.76mm) at the end of the fingerboard all the time. My fingerboard was dressed for fat low tension strings with low action, and it does an excellent job of handling it.