5/5 corruption tree feat
This used to be our fear/stun spell - it would randomly fear your target, or stun him, making him stand still. The problem was: the fear was making your target run around like an idiot and stun proc was low (I am not sure if it was charm or stun).

As of patch 3.0 this all changed. Now days Death's Gaze always fears target and debuffs him with snare, making him easy target.

Here is what you should know about death's gaze:

Get those shards!
It needs one shard. Period! If you want to get DG from the very start (which you should) you can easily get it from either stealth attack or FTD. GC is also a good opener for both snare stacking and shard generation.

Chain CC
Since death's gaze is the only fear spell available to Corruption/general, hybrid assassins it can be used to totally Chain CC all classes wearing light armor or less:

FTD(gain shard)->Death Gaze (Slow death strike)->Snap Kick (SS)

1/ From the Darkness opens the chain for both element of surprise and shard generation.

2/ After fearing your target use Slow Death Strike to deal good amount of damage over time (DOT) to spread you DPS a little.

3/ When your target is DOTed use Snap Kick to get him down and then unload on him your highest SS buffed with Lunge or corrupting strikes.

CC breaking (PVE)
As since patch 3.0 all mobs can break fear/charms when you deal X ammount of damage to them. With that in mind use DG on the last combo step (it will not undo your combo!) and then unload SS rather than fearing and going through all the combo steps because the mob will break free.

Combo/skill breaker
Death’s gaze works wonders as combo breaker. If, for example, barbarian is unloading his cyclone of steel on you, use DG to fear him and avoid massive damage being done to you. Same with POMs knockback, oraz heals.

Death's Gaze as snare
Since this feat has range of about "dubble tap forward" you can chase after your opponent and fear him up as you get close to him.

Snare stacking
Death gaze snare stacks with grim corruption snare so you can:
Grim corruption-> Death gaze

this will get your target from "slowly running away" to "baby crawl" speed.

Closing notes
- Death gaze is a spell - it can be resisted by your target.
- When fear breaks/ends so does the snare.
- If you have shard you can use DG while mounted.