Regardless of the aerial system you also have to consider the hardware limitations of the receiver.
1 tuner = 1 transponder. So if you want to record from 2 transponders on 19.2E and record from 1 transponder on 0.8W at the same time you need 3 tuners.
Also, if you are thinking of having a twin LNB for 19E and a motorised LNB how are you thinking of interfacing these to the Ultimo? Are you going for 3 tuners? Or will you just have 2 tuners and be sharing one tuner between the 19E fixed dish and the motorised one?