MR 816 CSX Cubase 6 and MIDI Question

This is more of I think I’m lost question. I Have Cubase 6 with a Tascam FW1884 that had 8 channels audio IO and MIDI in and out. So now with the new MR 816 CSX and Cubase 6 what will I use for Midid controllers to connect to cubase so that there is no latency, Any help would be greatly appreciated.