Blaze is the most dragon character we’ve seen in the series. She would legit sleep on a pile of gold if she could

Maybe she does. We'll just never know, i guess.

Wait, 3 tribes? Do you count some Sandwings as a tribe, or do you mean Blister's historical alliance with the Mudwings? It was 3 tribes in total, but Blister was only able to maintain an alliance with the Seawings. She had the Mudwings for part of the war, but the Mudwings changed their allegiance to Burn. Blister was able to acquire the Nightwings later in the war with Morrowseer and Queen Battlewinner.

By tribe, I mean a large group of dragons from that tribe. It said in one book Blister left the stronghold before the war with most of the sandwing army. So I technically count them. And the Seawings, since they were allianced with her also. And the Nightwings.

I thought Blaze had the support of most of the Sandwings. It said so in the first book.

I think it said she left with her most loyal subjects or something. I can't remember that well