I would take out Lennox, as he is only a 6/6 with a good bonus and a nice ability, but he is not that good. I would prefer Fixit, cause he has a very solid ability.
And Ambre is fine, you just have to learn to bluff with her occasionally.
Sob is a very useful ability against Montana for exaple. You don't have to bother about their -12 attack bonus.