A good question! I can understand that it might seem difficult at first to moan Praenomen and Nomen every time but as with most things all you really need is pratice. And in this case, the correct breathing technique. Here is a little example!
Inhale, then on the exhale Moan "Luc-" but instead of pronoucing a "c" either sharply breathe out to produce a breathy version of the sound or be more vocal by pressing the back of your tongue to the roof of your mouth and sharply breath out.
On the inhale Moan "-ius". You can kind of swallow the "iu" but make sure to hiss the "s" which is easy to do while breathing in.
On the exhale Moan "Cor-". You do not want to pronouce the "r" as it will interfere with your flow in my experience but instead go for a "oah" type of sound that comes more or less naturally with moaning anyway.
On the inhale Moan "-neli-". Again, you probably should half-swallow the "n" and more or less omit the "l". A very breathy "e" and "i", think of the way you hissed on the inhale earlier. It is also possible to carry the "i" over to the exhale if you want to be louder.
On the exhale Moan "-us". You can really put your heart into this one. "u" is bit challenging to moan once you really get into it, so feel free to pronounce it closer to "o". On the exhale, the "s" does not shine as much, so if the situation calls for it, you can carry it over to the inhale, hiss it and scream something fitting directly after.