We don't actually have full control over the server, but the #monitor return is giving us the FPS of 2 after four hours.
Debug checks return at: 0000h 47fps // 0100h 36fps // 0200h 29fps // 0300h 17fps // 0400h 3fps
With variation of course, but no more then +- 4.
I haven't checked that far yet, I'm just eliminating all possible sources of error in regards to add-ons (had some minor ones loaded).
Fixed: Turns out it was just some loaded addon (GMJ_Sight adjustment) that was killing the server.