Correct I did not mention Shadow Strike. Unlike the other powers listed above, which only state Stealth is required, Shadow Strike is listed within the Stealth granted by Night Warrior only and was not relevant.
Night-warrior stealth sets up a special switch that activates those powers. After all, they did come out at the same time, and this was a period where cryptic coding was notoriously sloppy.
That said, Smoke Bomb should probably activate these powers, as it explicitly places you in a stealth stance - In fact, it already turns on a special switch that causes Shadow Strike to trigger its high damage. To add to this, Smoke Bomb has some very specific effects that classify it as a full stealth activation: you are dropped from combat and become very hard to see.
By that logic, EM would theoretically only trigger stealth around 50% of the time - because that's the condition by which the full aggro drop occurs. Otherwise, it just obscures you from enemy targeting - they still know you're there and even walk towards your last seen location.
Sigils of Radiant Sanctuary, however, is out of the question, because it finely shows the problem with using a discrete power buff with a non-discrete property - when should Throwing Blades/Gas Pellets begin doing extreme spike damage or toss out a huge cluster? Should it when standing next to one sigil? You are under a stealth buff, after all, but by that logic, it should also trigger all the time when using Shadow Form, since that also offers a passive stealth buff.
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That said, Smoke Bomb should probably activate these powers, as it explicitly places you in a stealth stance - In fact, it already turns on a special switch that causes Shadow Strike to trigger its high damage. To add to this, Smoke Bomb has some very specific effects that classify it as a full stealth activation: you are dropped from combat and become very hard to see.
By that logic, EM would theoretically only trigger stealth around 50% of the time - because that's the condition by which the full aggro drop occurs. Otherwise, it just obscures you from enemy targeting - they still know you're there and even walk towards your last seen location.
Sigils of Radiant Sanctuary, however, is out of the question, because it finely shows the problem with using a discrete power buff with a non-discrete property - when should Throwing Blades/Gas Pellets begin doing extreme spike damage or toss out a huge cluster? Should it when standing next to one sigil? You are under a stealth buff, after all, but by that logic, it should also trigger all the time when using Shadow Form, since that also offers a passive stealth buff.