I made a spreadsheet to make it easy to calculate the % damage increase you get from power and crit. Made a short vid explaining it (link to spreadsheet in description):
https://www.youtube.com/watch?v=wUhTvB-hqjM
Here's a good link to diminishing returns with a graph that's been floating around the forums for a while (I don't take credit for it):
https://www.desmos.com/calculator/3dqpvhuavj
Comments
I hate RNG. I'm so unlucky like you have no idea tbh, and that's exactly why I avoid classes that rely on crits, that's why I avoid expecting a crit and... yea. I've landed some tons of Ice Knives but until then I've never landed a crit Ice Knife out of EotS, and I have 35% crit chance.
Kaelic also did a great guide on this as well.
EotS does change things, of course, and feats change things, of course, but you can calculate real crit % with a few control runs.
Everything you need to know about CW:
http://nw-forum.perfectworld.com/showthread.php?780981-Chem-s-CW-Compendium-Everything-you-need-to-know
Could you uh.. elaborate? lol if you're asking about how much armor pen affects damage, then that depends on who/what you are attacking. I could make it so that you could input your resistance ignored and the targets' damage resistance to see the % damage increase, but not sure how beneficial that would be to people.
For PvE you generally want about 24% resistance ignored to be able to ignore all the damage resistance of a boss, but about 2%-4% of that resistance ignored (maybe more) is wasted during the trash clear because trash mobs don't have over 22% damage resistance. From what I understand (haven't tested myself), only the tougher elite mobs have 22% damage resistance. If you wanted to you could equip certain accessories for trash and certain ones for bosses to have 20% during trash clearing and 24% during boss fights, but it doesn't make a big enough difference in my opinion to do that.
On my CW, I think I have 22% resistance ignored because CWs focus more on AoE and clearing trash and I could drop it down to 20% to get more power if I felt like it. However, as a GWF I get the full 24% because I'm usually on the boss if I play that character and it's also easy to get 24% resistance ignored because Con gives resistance ignored so you don't need to get your armor pen stat very high. So for any class that has an attribute that gives resistance ignored, I would recommend getting the full 24%.
As for PvP, this depends on the situation really. I just recommend getting most (if not all) of your arm pen through gear, boons, artifacts, etc and slot for power. I like to get about 2000 arm pen (or more if I can get it without sacrificing power). More armor pen will be more effective against tankier (high DmgResist) people, while not help much against squishy (low DmgResist) people. You also have to remember if you're using a plague fire weapon enchant, it decreases their defense stat. Also things like unstoppable, sprint, astral shield, etc increase damage resistance. Although resistance ignored can be really beneficial against tankier people, you can only stack so much armor pen before the diminishing returns are too harsh (wouldn't go above 3000 imo). So in the end there's a lot to consider.
So if we look at it as:
power_modifier * (1 - min([Enemy_Armor - Our_ArP],0) ) -- you cant have more ArP than enemy defense hence the minimum = 0
We see that for every percent that we put to power and take from ArP we will loose some damage.
Why is this important ? Because power has no Diminished returned and ArP has a very steep one.
So, your benefit from ArP is depended on the defense your opponent has.
In PvE it is simple and you should choose based on what you mainly kill, in example if you usually do t2/cn you will want to go around 16-20 for AoE classes like CW. if you do mainly Epic lostmauth than I would go for a bit more (up to 24%).
The general Expected value of your damage will be something like:
ArP_points = the points you put as GS.
ArP_multiplier = 0.3572*ArP_points^1.88 / (1225801+ArP_points^1.88)
power_points = the gs you put as power.
enemy_resistance = the opponents defense. (if you have ArP from abilities, you can subtract from this value)
damage_with_power = (1 + (0.00006*power_points))*(1 + min(ArP_multiplier - enemy_resistance,0))
crit_points = the gs you put in as crit.
crit_base = crit chance you get from all abilities and feats that are not gear (%/100)
crit_chance = 0.288 * crit_points ^ 1.2/(10186+crit_points ^ 1.2) + crit_base;
So at the end the estimated value of your damage will be:
E = crit_chance * damage_with_power * (1 + crit_severity) + (1 - crit_chance) * damage_with_power;
If to put it all together you can get a damage function f(power_points, crit_points, crit_base, crit_severity, ArP_points, enemy_defence_after_reduction)
And this function you want to maximize (not counting modifiers like EotS that screw all this in real life)
[Can find working example that is not going to be relevant soon at http://nw_crit.mmi-sd.com/
left table is for all classes, the right includes Critical overrun
perhaps just an idea how you can add to the spreadsheet by adding the diminished returned functions]
Yes, Armor Penetration.
From what I understand this is a conversation on when you should stack power over crit.
If it was a conversation on all stats, i could see your point in sayin Armor Penetration two posts in the same thread.
People already know the soft caps on ARP. No need to bring armor penetration into a conversation on when to stack crit over power.
What about recovery? That gives a boost to damage to...but this isn't about when to stack recovery OR arp over power or crit.
The reason people wonder about what to stack ...power or crit is because AFTER ALL SOFT CAPS are reached you can still stack power AND crit. You can raise crit up above 3k and still get a more effective DPS boost than power in some cases with a perfect vorpal.
To paraphrase the housekeeper lady from Family Guy "No,... no...no...meester armor pen no heere."
I might add to the spreadsheet in the future, but I wanted to keep it simple for the most part. Most people seem to know about soft caps, armor pen, etc. One of my guild mates would always ask about how much crit he should have so I ended up making the spreadsheet when I was bored lol (Also haven't been playing NW lately, but will be back for mod 5)
Here's a good link to diminishing returns with a graph that's been floating around the forums for a while (I don't take credit for it): https://www.desmos.com/calculator/3dqpvhuavj