Well this depends really.!! How strong or well built is your machine.? If you go by the Calcs etc then the feeds and speeds are very high for a 5mm cutter.

For instance G-wizzard gives the following for PLy with 5mm 2 flute carbide cutter cutting full 5mm slot.
Opitmized for best tool deflection, which is good for thin tooling as reduces chances of snapping. . . DOC 1.4mm Feed 17500mm/min spindle 28700RPM. . !!!!!

Carbide tooling but not optimized with DOC 2mm(40% cutter Dia) feed= 16,500mm/min spindle =27,000rpm

HSS tooling not optimized with DOC 2mm(40% cutter Dia) Feed= 13,700mm/min spindle= 18,700rpm

Obviously your machine needs to be very strong and powerfull to handle these numbers so you'll need to decide for your self thru trial and error the best setup balance which suits your machine and the cutters/material your using.

Personally if your machine can handle the feed rates then I'd go with the HSS settings as a first port of call, even with carbide tooling.
Without knowing your machine it's very hard to advise so just take these numbers and use them as a guide.