My main progression of escaping is generally this in chronological order.
headscissor if I can, because it is hilarious and super effective when I can lock it up, which is fairly often. Most common is normal RNC defence but instead of cupping the back of their leg turn palm towards you and move like you are combing your hair back with your hands, bridge and shoulderwalk out, if that fails but you separate the legs a bit and have a little space hand goes to post on their leg, invert then use your foot to kick their leg away and backroll to get on top, or lace your leg in between theirs then attack the leg. Get up then knee on face, failing that knee on face leg goes all the way over their body, sit on them like a shitty russian cowboy but you are getting armbarred, pull out then leg lock.
Beyond that learning all the different grips that exist to save your arm, ie RNC, gable, gable 1 in 1 out, S, cupping your own leg, etc, and being able to switch between them as the need arises faster than they can adjust is important.
My armbar defense is my best defense, and my defense is my bast attribute.