I do IL's. Maybe twist the cam angle so it's closer to you at a certain point and it closer and you can react to it
I personally use something we top-level runners like to call nose-strats. Pretty much how it works is your hold the gamepad normally, and when something comes up you quickly hit the gamepad with your nose so you don't have to take your hand off the gamepad.
and before you ask no I'm not joking, I actually do this :)
I just reread your question, and to answer the "how do I change the camera" question, I personally hold my gamepad like this, so that I can move my camera without moving my fingers. Kinda clawgrip-esque but it works well. https://gyazo.com/751b282b07872240ecf9d304bc7f34cb
What I do, is use middle finger for the Y button, ring finger for A, and pointer finger to use touch strats
As for turning the camera, whenever I am in mid air or something I quickly flick my thumb up to the right stick to change the camera.