Numbers Help Please
I have a two-part question, seeking a definitive "what's best?" for a particular scenario. It's pretty simple to explain the background:
I currently have a level90 Whirlwind Barbarian that's running Pindleskin and horking his guts out (literally, 51% of the time :wink

. My end-goal is (eventually) to get to level95, and the primary method of getting there will continue to be (/players7) Pindleskin runs. So I am looking at a few thousand runs. He's dual-wielding, using a Grief Phaseblade (+356) and Azurewrath. Those facts are not going to change, so if you feel like saying "use Grief+eBotD/Beast and run Baal you noob", you can stop reading now and go "help" someone else. :wave:
My AR is a little low (5742), so while I was leveling up to this point I have socketed an 'Eth' rune in the Azurewrath for it's cheap boost to my hit-chances. However, as the barb has gone up in level the benefits of the 'Eth' rune are starting to wear off - I think - and I'd like to resocket something that will boost my damage (as much as possible) instead.
Part1: Verification of Chance to Hit
I seldom delve very deeply into the numbers behind D2, so I could've easily made a mistake (or three) in my calculations so far. And since this is one instance where I'd like a more concrete answer of "what's best?", I'm asking for someone to confirm my chance-to-hit numbers are reasonably accurate first. My primary goal is to maintain 80+% chance to hit against non-Stoneskin Pindle, preferably ~85+% or higher. After that goal is safe we can move on to part two.
I've managed to track down a little info and plug the numbers into a calculator and I think I have my chance-to-hit figured out:
- my level = 90, pindle's level = 86 (I know I at least got this much right)
- My AR: 5742 (I'm trusting the LCS here - please tell me this is one case where it's accurate :nervous

- Pindleskin's base Defense Rating*: 1192 (retrieved from Rhettius' backup of d2data.net)
- with the Eth rune working at half-effectiveness against a super-unique, that would leave him with (1192 * 0.875 =) 1043 base defense.
Do Eth's work this way?
- If he spawns Stoneskin, Pindle's defense will be doubled (according to the Arreat Summit). That's 2384 defense without the Eth, and 2086 DR with it.
- the CTH formula I used was found
here, and, to save you swapping pages back and forth, is:
100 * AR / (AR + DR) * 2 * alvl / (alvl + dlvl)
AR = Attack Rating; alvl = Level of Attacker; dlvl = Level of Defender; DR = Defense Rating
*I'm not concerning myself with Pindle's minions; I'll assume that if I can easily hit Pindle, I'll easily hit them too. Likewise, I'm not concerning myself with my CTH with the Grief.
So, plugging that all together, I came out with the following chances to hit, with and without the Eth rune.
Barb is Level90
Without the Eth: 574200 / 6934 * 2 * 90 / 176 =
84% chance to hit
With the Eth: 574200 / 6785 * 2 * 90 / 176 =
86%
Stoneskin, without the Eth: 574200 / 8126 * 2 * 90 / 176 =
72%
Stoneskin, with the Eth: 574200 / 7828 * 2 * 90 / 176 =
75%
Barb makes Level91
Without the Eth: 574200 / 6934 * 2 * 91 / 177 =
85% chance to hit
With the Eth: 574200 / 6785 * 2 * 91 / 177 =
87%
Stoneskin, without the Eth: 574200 / 8126 * 2 * 91 / 177 =
72%
Stoneskin, with the Eth: 574200 / 7828 * 2 * 91 / 177 =
75%
... yada, yada. 2-3% difference in CTH looks pretty insignificant on paper, especially when a 40% Ruby Jewel, or maybe even a 75% Eld rune might provide an extra 1k damage per hit (or it might not

).
Is my math correct thus far? I did a quick run to confirm it's close in the LCS (it is), but I trust the LCS about as much as I enjoy getting stuck questing through the Great Marsh with poor lightning resists and Gloams all around. Assuming my CTH reaches my goal (80/85+% CTH) without the Eth rune, that leads us to...
Part2: Eld rune vs. (40% ED) Ruby Jewel vs. "Other"
Here's where my "knowledge" ends: the Damage-to-Undead modifier is calculated differently than on-weapon Enhanced Damage. Actually, I'm not even certain that's true, but I think it is.
So, since this barb is purely an undead-hunter at this point (and when he's not, he won't be using the Azurewrath), I'm trying to figure out if sticking an Eld rune (+75% Damage to Undead, +50 AR) in the Azurewrath will provide more benefit than one of the 40% Enhanced Damage jewels I've been hoarding forever. None of the jewels I have has a noteworthy 2nd modification.
Or maybe there's something else like a Sol (+9 min damage), Fal (+10 Str) or even PAmethyst (+150 AR) would actually make more sense for increasing my damage (sorry, no spare Ohm's, Lo's or Ber's to drop in there, so don't suggest those). I'm skeptical of this case, but it never hurts to think about.
Other (possibly) salient facts for determining damage:
- I have 177 str, and that probably won't drop. It certainly won't go up.
- He's running with an Act2 merc that provides a Might aura (Act2, NM, Offensive merc). The merc is level90 too, and keeping pace with the barb just fine.
- The Azurewrath has a level13 Sanctuary aura (510 ED%) and 263 base ED% (120 base weapon damage, average)
- 20 skillpoints spent in Sword Mastery & Whirlwind, with no +skills beyond the +1 on the Azurewrath, and no other consistent source of +physical damage.
But I don't know how to figure damage-dealt out, especially factoring Might+Sanctuary auras, Mastery and Whirl-skill damage, On-weapon ED% and Damage-to-Undead modifiers, etc. So I'm asking for your help here. Thoughts? Suggestions? Links?
Thank you in advance.