The general concensis seems to be to use the timing setting that matches the injector breaking pressure.
So if you use 135bar (NA) injectors use the NA timing settings (0.90-1.00ish)
If you use 150/155bar (turbo) injectors use the turbo timing settings (0.95-1.05ish)
If you (or someone like Giles) has modified the pump to have lots of additional dynamic advance then the NA settings will work well even with 155bar injectors.