Best combo to hatch dragon egg

I have an egg, I have all the dragon knowledge. Unfortunately my character is not dragon blooded, but i have a courtiers or 2 that has a small amount. I know bastard and valyrian if that makes any difference. Ive tried save scamming but haven't gotten anything to work. Any stats or certain combos that work best? Knowledge or esoteric hatching? Any help ks appreciated thank yoj!