"I seem to like having mobility/escapes/tricks and attack" does not jibe at all with Bloodhound, Lifeline, or Wattson. Maybe not even with Ballistic. The legend I associate most with those qualities is Valk, and while you did mention her, she was pretty far down the list.
That said, the new Apex is about motion and very little else. Octane is the rustiest arrow in the quiver. Valk, Ash, Sparrow, each has benefits and drawbacks - the choice between them probably having to do most with the subtleties of your own personal play style. I would also count Wraith as mobility-based, but like Octane, she's arguably been superseded, as most of the original legends have been. Limited mobility would be Loba, Horizon, and Rev. Maybe Newcastle in a loose sense. And you might have to include Fuse on that list now. Again, let your own play style be the thing that points you in the right direction.
For me and my own play style, the most important quality a legend can have is the ability to instantly reset the terms of engagement, especially for the rare times when an engagement comes on me as a surprise. There are a lot of legends that can do that, but Valk is the best fit for me. I think Ash would probably suite me as well, but I've been using Valk for fifteen seasons now and I haven't really felt any weakness in her that would make me try someone else.
Whatever choice you make, keep mobility in mind. It was always important. Now it's critical. A few seasons down the road it will be all there is.