So my brett beer was fermented using only brett and is now sitting at 1.010 I am planning to blend it with a saison that is at 1.010. If I blend at around 1 part brett to 4 parts saison should I be adding priming sugar or will I get enough carbonation just from the remaining sugars?

It's hard to say. Best way might be to put a sample of the blended beer on a stir plate to see if it goes any lower. Or prepare one bottle each way.