To-Hit Debuff question….

[Hogunn]

Hey all. I can’t seem to figure out how much defence I need combined with a to hit debuff power like Radiation Infection on a defender. It is pretty easy to get the to hit debuff to 50%. How much defence is needed to combine with that to “max” your defence? 

[Luminara]

Depends on the level of the enemies.  -ToHit is subject to purple patch reduction, so let's take that 50% and hit it with some math.

 

If the targets are +0, there's no change, it's 50%.

 

If the targets are +1, your 50% would be 90% effective.  50 * 0.9 = 45%.  You're still where you want to be.

 

If the targets are +2, your 50% would be 80% effective.  50 * 0.8 = 40%.  You need at least 5% Defense.

 

If the targets are +3, your 50% would be 65% effective.  50 * 0.65 = 32.5%.  Now you need at least 12.5% Defense to get back up to the soft cap.

 

If the targets are +4, your 50% would be 48% effective.  50 * 0.48 = 24%.  You're going to have to scrape together at least 21% Defense at this point.

 

The "at least" in each of those calculations is there because lieutenants and higher ranks have higher base Accuracy multipliers.  Lieutenants have 1.15 Accuracy, bosses/EBs/snipers have 1.3 Accuracy, GMs and AVs have 1.5 Accuracy.  That number is a multiplier used for each power they have, so figuring out exactly how much -ToHit or +Defense you need is... a very long, tedious job that I'm not going to volunteer for.  In practice, the rank-based Accuracy modifier doesn't make much difference, though, so you can ignore it.  Use the above-listed numbers as a reference and go to town on their asses, you're not going to get hit often enough to worry about the discrepancies.

[Without_Pause]

This also doesn't factor in a mob's own -Def attacks with a Defender's lack of DDR or +ToHit which is what I find more annoying. I try to get as much Def within reason on a Defender with some purples on occasion and leave it at that.

[aethereal]

11 hours ago, Luminara said:

The "at least" in each of those calculations is there because lieutenants and higher ranks have higher base Accuracy multipliers.  Lieutenants have 1.15 Accuracy, bosses/EBs/snipers have 1.3 Accuracy, GMs and AVs have 1.5 Accuracy.  

 

Enemy accuracy is irrelevant here.  It's applied after the softcap clamp, so you can't reduce an enemy's chance to hit you down below 5% x their accuracy with more defense or to-hit debuff.

[Ukase]

Just for the sake of clarity for the OP, and anyone else, the term "softcap clamp" used by @aethereal is likely referring to this equation here: 

[tidge]

As described by @Luminara above, the math (long ago) moved me away from trying to rely on many forms of  -ToHit being applied to enemies as a survival strategy, at least outside of relatively lo-level solo-play... and certainly not on +4x8 content. Obviously this falls into the category of 'every little bit might help', but so often the -ToHit becomes unreliable... either because it didn't affect the enemy or because there are multiple enemies that it isn't affecting.

[aethereal]

22 minutes ago, Ukase said:

Just for the sake of clarity for the OP, and anyone else, the term "softcap clamp" used by @aethereal is likely referring to this equation here: 

Yes, specifically the inner of the two clamps.

[Maelwys]

Also worth remembering Archvillain Debuff Resistance

https://homecoming.wiki/wiki/Archvillain_Resistance

 

[Doomguide2005]

1 hour ago, Maelwys said:

Also worth remembering Archvillain Debuff Resistance

https://homecoming.wiki/wiki/Archvillain_Resistance

 

Yes and as I recall there's even a handy example in the article which is based on a RadEm debuff.  Against a +4 (lvl 54) AV the answer is it ain't doing much ... by itself