Another hint: if you are in unarmed mode and get attacked just use auto-attack on the enemy and it switches to armed mode with all the most needed hotbars. My problem is that since I use mages I removed it. That's why I was doomed.
And yes, L2/R2+L1/R1 cycles through all enemies selecting them!! Another life saviour that I discovered only after 25 levels. It was simply a nightmare to switch using arrows and then X. I also tried using the arrows as in the hotbar in your video, that didn't do much. Now instead I do FATEs switching between enemies in a breeze.