If you can't make a visual approach onto a runway with a T-VASIS, regardless of the amount of lighting on finals, then I suggest you hand your night rating in. You sound like a danger.
Lot's of guys in RFDS and NTAMS, quite happily and successfully land into black holes all the time. Admittedly, they get a lot more practice at it. And yes, I agree, a PAPI or VASIS should be the minimum approach path lighting guidance available for aerodromes serviced by RPT flights.
morno