@Dallten: That's a good idea in general imo. There are a few things that i would tweak:
(2) Set:
* Vengance gains the Seethe rune effect.
(3) Set:
*Using a Defensive ability will increase your resistances and armor by 10% for 4 seconds. This effect can stack up to 3 times.
(4) Set:
*For every 10 points of hatred spent, increase the duration of Vengance by 0.5 seconds.
(5) Set:
*Resource cost of spenders is reduced by 25% when vengance is active.
(6) Set:
*Increase the damage of your grenades, missiles and spike traps by 500% While vengance is active.
The RCR seems OP but i kinda wanted to put it in anyway - Originally i thought of just having the 2,4 and 6 bonuses but i added the 3rd and 5th just for the hell of it. I think this could be an interesting setup because it means that you rely on staying safe using defensive abilities (Caltrops, smokescreen, shadow power) and dishing out good damage with vengance that would encourage hatred spending and the usage of skills that incorporate missiles, grenades and or spike traps.
After giving it some thought, this sounds like an awesome candidate for the possible future overhaul of the Shadow set. Currently it only has 4 pieces and no one uses it because it only offers you with some survivability in essence. If the addition to that set in terms of dps would be vengance focused, it could be really nice.
Keep the good ideas coming people! If we get enough good stuff i might get motivated to do some photoshop work to make it look good. Then Bernardo can even post this on the official forums i guess? Why not.
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