Defense Debuffs, stacking, and chance to hit questions.

I'm using earth control, most the powers impose defense debuffs. I put up combat attributes for last chance to hit.

However, it seems that at some point defense debuffs no longer improve chance to hit. I assume it's something like you can only debuff to 0% or 5% defense on an enemy.

On a +3 I think enemy, I could not get to 95% chance to hit, no matter how many -def debuffs I applied. For powers with 1.00 base accuracy, I was only able to get I think 83 or something chance to hit. Powers with 1.20 base were able to get all the way to 95% still.

I guess my question is, how much -def is pointless for +1 to +4s, so I know what to expect and how much accuracy to slot, and if I still need tactics from the leadership pool.

I'm a little surprised, I thought any reduction in chance to hit would be directly the result of better defense on the part of the enemy, apparently level difference directly impacts it in a way that can't be completely negated with -def.

Yes, the caps are always 5% and 95% when it comes to both to hit calculations and then capped again after accuracy is applied. In old D&D terms, 1 always misses, 20 always hit.

See ParagonWiki: Attack Mechanics

As for your question, the first data table in the above link shows how your base to hit number is modified relative to difference in level between you and the critter. You can think of the difference between that number and the normal 75% as a defense buff relative to you so a +3 has an additional 27% defense (75-48) that a +0 wouldn't have.

Also remember that defense debuffs are resistible so they don't always apply in full.

See Attack Mechanics wiki page for a lot of info. Basically, there's always at least a 5% chance to miss.

edit: MIssed it by that much

I'm not a noob you guys, and I wasn't asking about the cap to hit, which is rudimentary knowledge.

I'm asking how much def debuff is more than is ever useful, as there are enemies that even with 60% def debuff I did not have a greater than 8x chance to hit.

Thanks again.

As I said, look at the first table at that wiki link to see how your to hit chance changes for the worse as you fight higher level critters. Your defense debuffs are fighting this and any defense the critters themselves have.

Also defense debuffs are resistible. Just because you threw 60% at them didn't mean it all took.

Ok I read it, but it doesn't add up or I'm just not smart enough to figure it out.

It was actually 65% defense debuff. 2 20% powers and quicksand at 25% all applied on the same enemy. Then attacking with a 1.00x power, that had one acc DO+3 slotted.

Now, ignoring the DO on this +3 minion I was targetting after having debuffed, the base chance for a 1.00 power would be 48%. Add 65 to that and you get 113, capped at 95. But I wasn't capped, and this was some low level outcast, not something that was debuffing my to-hit. For my resulting chance to hit to be 83~% requires something I'm missing here.

I don't know if anything else was in play, but it appears something is off. I didn't read anything in that guide as to what the actual defense of an enemy is, do they not even have a defense stat? It's confusing to me.

Your debuffs are also affected by the Purple patch. You said it was +3 levels to you, so your debuffs would drop to 65% of their normal power.

Okay, that makes more sense, didn't realize debuffs were reduced in strength. Thank you.