Timing tuning guidelines

[CivicVTi]

I will soon go to a dyno to tune my s200 equipped b16a. My car is NA with all major bolt-ons, CTR camshafts and higher compression. I will have a wideband so fuel tuning should not be difficult on a load dyno. However, tuning timing is not something I consider easy. Any general guidelines? Which base map would you use? The JDM,USDM and ASIA/Euro b16a maps are completely different (with differences up to 5 degrees in some points).