Lavendar Ermine Ameraucanas

[Shakethatcas]

I have a fresh hatch of Ermine but even though it was black over Ermine pairing, all of my hatches were Ermine and I wanted blacks. I contacted the seller and they had some blacks for me. AND a gorgeous lavender pullet. I was instantly in love

This has lead to 7 hours straight of trying to figure up breeding potential and my brain is mush.

I found a pretty good chart but when it mentions Ermines it says 'black ermine' which is confusing and also says Dom white over lavender is black splits but other things online say that will give 100% lavender ermine?

I understand that the black and lavender are competing genetically so in my head Dom white over lavender should give the same results as black over dom white but in lavender to produce lavender ermine.

So what would I need to do to create this lavendar ermine? I understand it can take generations, I love a good long project to keep me excited

For my Ameraucanas I have:
9 Ermine chicks - should have atleast 1 of each hopefully
2 black pullets
1 lavendar pullet
1 Black roo

I'm on the lookout for a Dom white to complete it. If not, since I've never seen them posted, I'll breed 2 Ermine to get one.