The resilience cap refers to the maximum amount of dot, mana drain, and crit damage protection one can get. 1230 resilience reduces the chance to be crit and damage taken from dots by 15%, the mana lost to mana drains by 30%, and the damage taken from criticals by 33%. Resilience over this amount affects only the chance to be crit.
105 hit vs most targets
158 hit vs Draeni/Undead/BE (hit is currently broken with racials, but this is supposedly fixed in 3.0.8)
We fixed a bug in 3.0.8 where the racial spell hit bonus was applied after the other modifiers were added, meaning that you could not cap yourself above it. Now if you really want to hit races with certain spells you can.
WotlK Shadow Resistances
160 Felhunter (all specs)
140 Mage (80 Magic Absorbtion, 60 talented Mage Armor)
130 Shadow Protection
The resistances formula at 80, for binary spells (which includes fear and mana burn), is:
%_resist_chance = (resistance - spell_pen) * (15/80)
For targets with the applicable resistance, spell pen to eliminate resistance based resists is much more valuable than spell hit to eliminate the default miss chance.
Amount needed to have a 1% better chance to land a spell Penetration 5.3 Hit Rating 26.2
However, when the target has no resistances, spell pen is useless. There is no holy resistance stat, only shadow resistance applies vs. priests.
Spirit vs. MP5:
Spirit isn't as good at level 80 as it was at 70 (http://www.arenajunk...ead.php?t=47913). For two items giving equal item values of Spirit and MP5 (2.5 spirit to 1mp5, see Hateful Gladiator's Cloak of Deliverance vs Hateful Gladiator's Cloak of Salvation), it's generally better to go with the mp5 regen. The actual value of spirit in mp5 depends on your int and the % of the time you spend inside the five second rule, and can be seen in this chart:
Note: Chart assumes you have full Meditation... if you don't, get it. Also, specs like Enlightenment and Spirit of Redemtion, int buffs, and the human spirit racial should be taken into account as slightly buffing spirit. And if you are getting an innervate, that's a lot of extra value from spirit as well.
After patch 3.1, spirit will unequivocally suck.
1% haste = 32.79 haste rating
Insightful Earthsiege Diamond:
The new mana proc meta is 33% better at 80 than the level 70 version (while it had the 2% proc rate). Two ways of looking at its value are:
1) With 600 mana restored on 2% of casts, this is equal to an average reduction of 12 mana from the cost of every spell cast. That is .31% of base mana, so the cost reduction of various spells are (for untalented mana costs):
% Mana Cost Reduction Shadow Word Death 2.6 Dispel 2.2 Renew 1.8 PWS 1.3 GHeal 1.0
2) Depending on the frequency of casts, you can convert the average proc rate into mp5:
Casting every MP5 1.5sec 40 2.0sec 30 2.5sec 24 3.0sec 20 3.5sec 17 4.0sec 15
Expected Stats in Full Deadly (Pre-enchants and Gems)
689 int (792 with Mental Strength)
1257 sta (1320 with Enlightenment)
790 resil (800 with socket bonuses)
19350 hp (19980 with Enlightenment)
13918 mp (15463 with Mental Strength)
Remember, these are just base values without any enchants and gems!
Int Stam Resil Spellpower Armor LvL 80 Base Stats (UD) 172 68 106 (from agi) Deadly 5-Piece 224 515 271 452 1250 Set Bonus 50 Deadly Offset 103 236 137 222 520 Deadly Jewelry and Cloak 111 255 144 191 154 Medallion of the Horde 84 Battlemaster (Spellpower version) 111 Deadly Weapons (Staff + Wand) 79 183 104 498 689 1257 790 1474 2030