14 is solid for content but i can't tell people this enough, Stress test your server.. Every big server it happens 200 odd people log and a bombardment of crash's come after.
So one of the big ones, if you haven't done anything with how Crystal utilises spawns, you WILL get server side lag, when your UC goes past a certain threshold (your mobs will just stand there and do sweet f/a).
Changing your spawn system to be more efficient will sort it out.
Logging is another huge one (that people are aware of) using the default logging will cause it to appear to crash (when its just stupidly large amount of lag)
> Utilising other logging methods cures this ; TPR we log near enough every possible player transaction so we have full tractability of everything, if we ever need it.
Because you've done it from the ground up, I highly doubt you will encounter these errors either; but it tends to be 2 of the major ones from the default source!