Enchanter AC Test

[Splorf22]

I tanked the foreman in OT (BDA was there for hammers and they were really nervous that I would kill him with the ROA [You must be logged in to view images. Log in or Register.]) with Qelen BP healing me for 3-4 minutes at a shot. The data is still quite noisy but I think its enough to make some reasonable estimates.

AC: 515 67.0/swing Hit: 72% Hits: Max: 23.3% Min: 10.3% Avg: 93 AvgDI: 86
AC: 593 68.8/swing Hit: 74% Hits: Max: 20.5% Min: 9.4% Avg: 93 AvgDI: 87
AC: 680 62.3/swing Hit: 70% Hits: Max: 19.6% Min: 7.8% Avg: 89 AvgDI: 81
AC: 702 60.0/swing Hit: 69% Hits: Max: 18.8% Min: 14.1% Avg: 87 AvgDI: 84

515->702: +11.7% effective HP
515->680: +7.5% effective HP
515->593: -2.6% effective HP
593->702: +14.7% effective HP
593->680: +11.0% effective HP
680->702: +3.8% effective HP

Average: +108AC -> 7.65% effective HP, 1AC = 0.07% extra HP

Loraen@ 1750HP + Bedlam 350 + Rune V 700 = 2800HP * 0.0007 = 1.98

Therefore 1AC = 2.0 HP in raw survivability, but this is displayed AC not item AC, and I get about a 1.2 ratio between item/displayed AC which would increase this number to 2.4. In addition AC has a few other benefits like more efficient use of runes/bedlams, more bash misses, and getting effectively better HP regen. So based on this (and assuming I haven't made any mistakes) . . .

TL;DR: 1AC = 2.4-3.0HP for intelligence casters at L60 depending on your preferences.