Well, this thread made me more confused than any other one. Here are some thoughts:
1. Stigmas & Explosion
I thought this is just an inverse of the build-up points of any other class. Rather than keeping track on your character, you place them on one enemy. I therefore assumed that Curse Burst 'consumes' these stacks like a Rogue/Assassin Deadly Blow skill. This thread makes me wonder if it stays for the usual max. duration.
Usually, I dont even consider to level any skill that grants double build-up points, since the net-benefit of one more of these points is irrelevant. However, I see a few builds here that maxed it. So I wonder if this comes from the strangeness of those Stigma points or from the 30% bonus damage. The latter seems also irrelevant, since it raises the damage from max. 21% to max. 27.3% usable every 5sec.
Curse Burst itself seemed weak, since it only deals 10% damage. However, like all AoE effects in RO2, the total damage makes it shine. Just to make sure, I understand this:
Lets say, there are 3 targets nearby: 1 with 5x Stigma and 2 with 1x Stigma and I use Cursed Burst on the one with 5 Stigma points, all three targets are dealt 35% damage? Or does it deals 10% damage to all three targets + 5% for each Stigma on the enemy hit? (In the example, it would be 35%,15%,15%)
Bram Gush
Seems fair to me. Its a "hits-10-AoE" and the damage is half as high as a single-target attack. The Rogue skills are similar: 25% for single-target, 13% for multiple-target attack skills. (BTW: This works for Warriors as well, however Whirlwind does double damage with a doubled animation time).
Evanesco
Does this skill generate threat? And let's say a PvE boss deals 5k damage to all 10 raid members, this would then deal the boss 5k damage?
All in all it seems a bit weak. To be comparable to a 100 DoT, the target has to deal 1k damage every 2sec. Effectiveness depends on the next skill:
Curse Reinforce
Someone mentioned that this is a flat increase.... this would be insane. This would be a 100% damage increase for all DoT skills. So is there any confirmation whether it is the usual +15% more damage (similar to other classes) or is it really a flat bonus?
Levicorpus
Have you tested it? Does it generate a 50% damage reduction for 10sec.? If so, it would even be miles better than the assassin skill (or any other tank skills).
Contingency
I have no clear view of this skill. First -1% defense (or max -5% defense) is completely useless, especially if this is defense not defense rate, so let's ignore this.
It strikes for 24% damage and has a very long casting time. This makes it weaker than Crucio, so the initial damage cant be the benefit here either.
The DoT is 5%, not quite interesting....
Now the point: I thought the damage would increase per CURSE... and Contingency isn't a curse, The six curses are: Crucio, Evanesco, Furnunculus, Blindness, Raw Tilt and LoD.
Since you can't have Blindness and Raw Tilt at the same time, it would explain why it only stacks up to 5 times.
Land of Darkness
Like any other AoE (f.e. Whirlwind), this spell can miss. Don't know if it's bugged though. The damage is quite ok, imho. It deals less damage than Crucio, but it can effect multiple targets. Just to make this sure: The damage is 15% your Matk vs. enemies with Stigmas, right?
Imperio
First of all: -100% acceleration (aka haste) means half attack speed, right? Are bosses affected by this skill as well? In either way, this would be a great spell (if it's working properly). This is more or less a "-50% damage" debuff on all mobs nearby that lasts for 30sec. Which would be similar to a 50% dodge chance or a 100% parry chance (excluding special attacks however).
Mayham seems to be a sort of PvP stun alternative. Rather than being unable move or to perform any actions for 3sec (stun), the target can't perform any useful actions for 5sec. The 30% chance seems too low, although this is an AoE skill.
Earth Worm
Does it deal damage to all the targets? It would be quite ok in this way. Rather than the usual "half damage, but multiple targets" stuff, it does the "full damage but double casting time" way (see Whirlwind or Arrow Shower). The movement speed reduction is quite a good bonus. A compromise - rather than melee+stun, it's ranged+less movement.
So as you can see, there are a lot of unanswered issues....