I stay away from Maltodextrin, so my mrps are a scoop of Labrada V-60 (protein powder blend) with half a cup of oatmeal. You can also add milk instead of water. Very easy to make.
I think that 73 grams of protein is a bit much for one serving the body can only break down so much at one time, as far as MRP's go, if your trying to bulk i would come up with something on your own,get some high quality protein from www.proteinfactory.com+some maltodextrin and some healthy fats and trow them all in the blender, 600-800 calorie shake should do ya well, thats about all your liver can handle at one time,if your trying to lean out the myoplex stuff is rather good but i feel it's a bit pricey just my opinoin though!