Quick question, can you respec when you first complete the second trial?

I want to start as EDC Lich and do a quickswap over to Spark Bloodmage at Interlude/Early Maps, do I need to do the second trial twice or can I respec on my first completition?

To change ascendancy choice you need to redo the trial with the same amount of points you had.
So entry token for the trial you choose that give 2 or 3 depending when you swap.

Need to unspec first all your points, can do it at balbala, not sure for chaos since i only do that one in act 3.
After you unspeced you click the altar and can choose to change ascendancy.