most powerful -def power?

so i hear that "melt armor" is the most powerful (unenhanced) -def power... is this true or is there stronger -def powers (unenhanced)
and are they strong becuase they do more -def or because they last longer?

im not sure off the top off my head but I do know for certain that Melt armor on a controller does -20% def where as Radiation Infection on a controller also does -25%def. Melt armor only last 40 seconds with a and recharges in 150 seconds where as Radiation Infection is a toggle so it last as long as you got end or dont get mezzed, held etc. Take that how you will

Atomic Blast does -50% def on a Defender, which lasts 20 seconds, can be enhanced and powerboosted

I think Liquefy (Sonic Resonance) has the highest magnitude Defense debuff (-37.5% for Defenders unslotted), but it only has a 30s duration, with a 300s base recharge (~150s recharge with slotting, 60s recharge at the recharge cap)

Edit: Whoops, I forgot about Radiation Blast; Silverado beat me to it; Atomic Blast (the Radiation Blast nuke) has the highest magnitude debuff, but lasts 20s with a 360s base recharge, as well as a nuke crash.

Radiation Infection (Radiation Emission) is probably the best Defense debuff over time, since it's strong (-31.25% for Defenders unslotted) and is a toggle.

Fallout is also a runner up, with -40% def unslotted

My vote would be Quicksand. With -25% def, a 25' radius, a 45 sec duration, *auto-hit* and the ability to stack (does the -def actually stack? probably not...).

Maybe not the biggest contender in the value of -def but being auto-hit is a plus considering you're making it easier to hit the target without a ToHit check.

[Irradiate] has 37.5% defense debuff for 10s in an AOE. Not the biggest, but up all the time with slotting (20s base recharge)

Changing things up a bit, I'm going with Sleet/Freezing Rain.

Sure, it's only -30% defense - but it's also -30% resistance, does half the damage of Ice Storm, acts as a mini-Ice Slick both in KD and slow, the -def/-res is sticky even if they leave the area, and it recharges quickly enough to be stacked with good slotting and a bit of +recharge. If you're doing -defense, I'm assuming that it's because you want to kill something faster; this helps that a great deal and does it each and every spawn.

In terms of "powerful", I'll take that. Melt Armor is only even considered a worthwhile power since it's one of two debuffs in an otherwise pure buff set - the stats on it are garbage in comparison to other debuffs (Anguishing Cry has more -def on a shorter recharge) - and that it's a ranged, target-based, relatively long-duration click debuff (40s)... factors which matter when you're trying to chase down someone in PvP when they may or may not go where you want them to for location-based debuffs and debuff toggles are so easily shut off.

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Why would you want that much -def anyway?

Play a Cold/Rad for -def overload

Infrigidate, Sleet, plus all the Rad def debuffs means you're hitting anything.

If you're a stone troller look at all those great powers listed in this tread you could combine with quicksand.

For most situations, a team doesn't need -DEF. In most teams past 22, against most enemy types, people should be hitting at or near 95%.

Therefore, if you're looking for some sort of huge -DEF power for the purpose of piercing enemies with really high DEF, I would suggest something that autohits. -DEF powers can be a sort of catch 22, and I know I've frustrated myself trying to hit an enemy so that I can debuff their evasion so that I can hit them.

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Originally Posted by PRAF68_EU Dispari has more than enough credability, and certainly doesn't need to borrow any from you.

I'd think Acid Mortar.

Defender Acid Mortar does like -25% defense. With a decent amount of recharge (which is easy to get if you've got the money and hasten) you can get Acid Mortar stacked double for about 25 seconds out of every 35. With five lady grey's and a recharge you get about 36% defense debuff from each mortar for a stacked -70% defense.

I don't think anything in the game beats that.

If you start talking stacking ... numerous things will beat out -70% defdebuff

I like dom Ripper. -30% which is enhanceable. Does good damage, 90deg arc, knockdown, recharge base is 12s and duration is 13s.