According to the new(ish) Marvel canon, she is the long lost sister of Odinson and Loki. She is a powerhouse who took on Odin himself (as she was trapped in the 10th Realm of Angels during the war between them and Asgard). Would love to see her introduced and I think she would fit nicely into either of the top two tiers.
Do you have any abilities that you can think of for Angela? I’m thinking her powerset should come in
or it could be 
I’ll come up with something and see if you like my speculations