Spandex,
No where in EU-OPS or Part-ops does it mention a requirement to see 6 lights. Never has. It simply states a 90m visual segment. If your manual states that then it is an addition by your company.
3 sets of 30m is perfectly legal as all you are doing is establishing the 90m. To taxi forward and leave perfectly good runway behind is not required. That's the position of the last 5 airlines I have worked for.