Cool then, oddly enough I didn’t see any Cubase 8 Elements.
I believe there’s always going to be ‘some’ latency, though very small and negligible even in the best conditions. If you were to play say, two identical audio files on each machine and listen through one of your sound cards, the other machines audio would give a very slight ‘flange effect’ from the miniscule latency/delay. But if you listen to the same audio files together, but this time listen to the Left channel of computer 1, and the Right channel of computer 2, you really can’t perceive the latency…then there’s the off-sets if needed. You probably know all this already 
PS, I meant midi sent via the System Link digital audio network itself, rather than a regular separate midi connection (in case there was any misunderstanding on that). Which was a comment based on countless posts I’ve read where many send midi via the VSL network, when they don’t have to.
Good luck! 