Around 910 would be fine in lv10 mythics. If your grp is overgearing 10s, you won't do amazing dps because our ramp up is just so long. In high keys, I think shadow is a little better than average dps spec. Dps is highly situational but shadows utility is better than most specs have. Shadows multidotting is strong and many boss fights have add so ToF is great, burst dps in the other hand sucks really badly. About the great utility, shadow got fine selfhealing, dispersion is pretty good defensive CD, aoe stun, enemy dispel, mass dispel, silece with a long CD tho and shackle undead. Even raid healing CD with lege helm