What are, in your opinion, the most underrated skills?

By underrated I mean two things:

Either A: Skills that, obviously, are very powerful but hardly used.

or B: Skills that are so seldom used you never even knew/forgot that they even existed.

For me, it'd be this skill:

http://gw.gamewikis.org/wiki/Rending_Aura

I've never seen this skill used, and have never seen it before until today when just clicking random article on the Wiki. Seems like a pretty darn powerful skill to me, especially against other Dervishes.

hmmm

Extend conditions
unyielding aura

those 2 instantly popped into my head for some reason

EDIT- this one right after:

Decapitate

Siphon strength
you know thats bad ass!

Onslaught (its good for stuff >.>)

[skill]Ether Prism[/skill]?

I don't know if it's underused or not, but it's a good E-Management skill when you have nothing else to bring.

The no attribute assassin signet that removes enchantments per hex - OMG it can remove spell proof enchantments if your target was pre hexed! I still need to try it.

And phoenix. Everyone says its a nub skill but its a fireball and flame burst rolled into one spell.

I have some really good ether prism builds. One I like is conjure phantasm and nightmare with mantra of persistance, gole, ether prism, energy blast and aura of res. 10+1+1 ES, 12 illusion, 8 inspiration. Cover the whole enemy team with non stop degen! Also you can try it with clumsiness and wandering eye, but the degen is better pressure plus the powerful energy blast spike.

Vow of Strength, most people think it sucks because you can’t use any attack skills( so no constant condition output through the use of attacking skills). But with the ~45% damage bonus each of your hit hits ~60 and you can employ the use of enchantments and stances.(Mirage cloak, heart of holy flame, heart of fury ....etc.)

[skill]Wailing Weapon[/skill]
[skill]Warmonger's Weapon[/skill]

I love [skill]Epidemic[/skill]

No one seems to ever use it though.

Peace and Harmony

Placebo just about every decent TA team in existance uses warmongers weapon.

for sure; if you think Warmogers Wep is underused, you can rot in hell
on a different note, Toxic Chill [E] for PvE, Shattering Assault [E] for general, and Angelic Bond [E] for PvE

Rending Aura is a staple of my favourite farming build.

I didn't even know that skill existed. I gotta try that out sometime.

I have yet to see one other person use [skill]marksman's wager[/skill]

[skill]Mending[/skill] .

[skill]Bladeturn Refrain[/skill]

A lot of paragon skills.

A lot of people use it with Broadhead Arrow.

lern2spiritway

At least last time I played it as a rit, at least

Epidemic is used a lot in BHA builds but i'm surprised it's not more widely used. I can imagine it not being used massively in PvP but in PvE it could be very powerful. You stack a load of conditions on a target like weakness/blind/cracked armour from an air ele, poison/dazed/cripple from a ranger, bleeding/DW/cripple from a warrior, poison/bleeding from a sin, etc... and then with a bit of timing a caster at the back of the group could transfer those conditions to several other foes. It'd take a bit of practice but it'd be pretty powerful if you pulled it off.

I used it in the ascalon missions in HM where there's lots of melee to spread blind/weakness around. Helped massively.

Marksman's Wager... ...

Draw conditions + mending touch to eat conditions like popcorn.