Tuatha De Danann in Time

My best guesses of the moment:
7500 BC: Island well populated
6000 BC: High Mesolithic culture in Ireland
4000 BC: Neolithic in Ireland
2500 BC: Bronze Age in Ireland
2000 BC: Fir Bolg
1900 BC: Tuatha De Danann
Order of reigns with guesses of approximate dates.
1. Nuada  1897 or 1477
2. Bres 1897 or 1470
3. Lugh 1870 or 1407
4. Eoch Ollathair 1830 or 1337
5. Delbaeth 1750 or 1327                         
6. Fiacha 1740 or 1317
7. Mac Cuill, Mac Cecht, Mac Greine 1730 or 1287
1700 BC Milesians 
600  BC Celts in Ireland
100  BC Gauls in Ireland