The outfit is called Demoniac it's not normally this colour It's default is Orange as for spec i'm playing Shadow

My talents are 1,2,1,1,1 rotation is basically 4,V,X,2 as your opener X (bloody dart) procs your soul badge and 2 (Time bomb) procs Mystic Badge so for 10s you can RB (Heart stab) and 4 (death from below) while soul badge is active heart stab decreases the cool down of time bomb so basically every 10s you want to X (bloody dart) and 2 (Time bomb). so the rotation would look like this 4,V,X,2 (Opener) RB+4 for 10s then X,2, (to reproc badges) RB+4 rinse and repeat use your V (blue buff) when off cooldown