You may have seen Mark of the Shattered Hand as a recommended optimization. If you have “Exclude Expensive Enchants” turned on, that’s the only choice Mr. Robot has to give DPSers. If you want the other ones recommended, just uncheck that filter and you’re all set! However, it still might be the best one for you – even if you are ranged, it still procs (despite the tooltip).
For Tanks and Healers, Mr. Robot uses Mark of Black Rock and Mark of the Shadow Moon as the cheap enchants.