Max achieveable DDR with SD?

I was wondering what is the max possible defense debuff resistance that you can get with shield defense.

As far as I know the only powers that add defense debuff resistance are active defense, which in non-enhanceable, and then battle agility which is enhancable.

Are there any other powers that I'm overlooking that add DDR and if you double stack active defense does that also stack DDR from it as well?

Going by the current Mids, it seems that fully enhanced for defense, battle agility adds 35.8% DDR.

When active defense is on that adds another 17.3% for a total of 53.1% or if you can double stack active defense for 70.4% DDR.

I'm not 100% certain how DDR works, but it would seem to me that at 70% or less DDR the set would be extremely vunerable to having it's defense negated due to stacking defense debuffs. As one hits, it becomes easier to put more of those debuffs on.

Are the added resists enough to keep this build from suffering greatly when it's defense is negated? I know SR can reach around 90-95% DDR, but doesn't have near the same resists other than it's scalable resist (which I can't recall what power that is in).

Shield Defense can reach the same 95% cap that Super Reflexes can, though it does require the use of HOs and stacking Active Defense.

How did you manage to get 95% DDR? With 3x Membranes in active defense and all the toggles ED-capped, I could only get 90% DDR.

DDR becomes less useful once your at the softcap. The less often you get hit the less often you need that DDR to keep your defense high. Most of the defense debuffs that will ever be coming at you in large numbers (Romans, Machine guns, and PPD) are very small. I think at most about 7%.

So at 90% DDR that 7% turns in 0.7% leaving you, mostlikely, still over the softcap. Edit: Short durations also mean that one usually leaves before another hits.

Even at 50% DDR on my Invuln, I never seem to notice defense debuffs. Though, this might be more because in a mob he's up at about 58% defense to all but Psi and that extra breathing room makes a big difference.

Um....

Doesn't sd have three powers that grant DDR?

Just sayin'

I have 91 or 92% with double stacked active, but I also have Ageless Radial for the +recharge, which also gives debuff resistance, so that puts me well over the 95%, I have been considering dropping down to 2 slots in Active, but I haven't done the math yet to see if I will stay capped, fairly certain I will though.

Nice to know, I never tried. So well that's the way to go, 3 52+ or whatever HOs should give the number I got from six 50 HOs and cap DDR

I believe that Grant Cover increases its effect with defense enhancements, and its recharge resist with recharge enhancements. I still only slot it with LotG, but it is worth testing.

Double Stacked Active Defense with three 50 Membranes (27.68% x2), Grant Cover (13.84%), and Battle Agility (21.84%) for a grand total of 91.04%, and rarely do I ever experience a debuff that matters.

SD used to be really easy to cap DDR, but around the time Castle "left" the value of grant cover was adjusted such that we now need at least lvl50++ HO's in the required powers to get 95% DDR- provided you only want to slot 3 of each kind.