Acid Surge and Toxic surge are used to decrease opponents vision, or even toxin them (throwing Knifes can be used aswell). Mostly it will take advantage of the Vision so i can use Obsidians ability without the enemy noticing what happens. An other option is to sneak to enemy and hit him with Tracer from out of nowhere. Armor is kinda random, but i liked the idea of an Assasin or something like this.
Rings: Well i got no poise and DWGR is nice to get fast behind the enemy or in an position to better pull of some harras.