The flying horse stalls, HMA's, generally run at 3 horses per unit as a standard across all airlines.
i also believe that each HMA would normally have a groom with it as well.
As for the combi aircraft - KL do on occasion still operate it in to DXB. The last time was about 7 months ago when they brought a Trent 800 engine on the main deck.
This in itself does or can cause some logistical nightmares. Namely with the provision of a high loader. The standard 'LDL' used for the lower holds will not extend anywhere near high enough to get to the main deck and as such an 'MDL' would be required. In most international airports, the cargo apron would be separate from the terminal apron and the problems of shifting one across an airfield can be serious trouble. Because the trailing bed is very low hanging, any gradients that are encountered enroute would pretty much have it either grounding itself or even tearing up the GSE roads. Not to mention that the moving speed is less than 5 KPH too.