Possibly Malosi too? Technically then Jabberwock should be able to hit but not to cast the poison.
Anyway, I would ascend Jabberwock first as he’s really good and his special is unique.
Then Freya (I have her on my queue, although I think I’ll do Kageburado before her), with other minion casters I think she would be really interesting.
Last Sargasso… I have him 1/1, although I’m curious about him. I think his special could be quite interesting in war when there’s Field Aid… the problem are his statistics, a bit outdated compared to heroes nowadays. Also he’s a fighter, a class that has a lot of competition for the emblems