Lap Sap, looks like you now assume the mantle of "smarty pants". You can have it! Your last bit "allowing the controller to forecast that the condition will exist" is the difficult part. Once the dye is cast you just have to wear it.
We don't actually get to utilise RRSM here a hell of a lot as the only time during daylight hours that the South runway (07R/25L) is in multi modal operations is between about 9 in the morning and 12.30PM and there aren't a lot of freighter arrivals then. As for the North runway, which is generally landings only, the rather large mix of heavies to mediums means that wake turbulence issues tend to cover most situations, that, and the fact that the high speed turn offs (A7 & A8 on 07L and A6 & A5 on 25R) are pretty conveniently placed and runway occupancy time on the North is pretty low.