Before I go ahead and record all the stat changes for the gear I've got in my bags, there's a few nuances I want to point out concerning challenge modes:
1. Taking off an item that does not have a particular stat increases that stat. I noticed this when taking off my boots
[Phasewalker Striders], as well as my off-hand
[Inscribed Red Fan]. Taking off the boots results in 6 extra mastery, and taking off the fan results in 5 additional haste. No reforging has been done into these stats. Same thing with my pants. Not sure what's happening here.
2. There's a discrepancy between the stats lost from taking off the item, and the stats gained from equipping it. For example, sitting at 4410 haste and taking off my Golden Lotus ring
[Simple Harmonius Ring], haste drops by 292. However, the haste value inside the dungeon is displayed as 298. This occurs on every item, and with every stat.
3. Hit is not reduced at all. It seems as if the game auto-corrects a loss in hit when entering, and gives you a static buff to put you back to the hit rating you were at outside. I was 2 over hit cap outside, and I was 2 over hit cap inside, even though the amount of hit on my gear had diminished. Removing pieces of gear with hit does remove hit, but in the same fashion as with all other stats (less than what is displayed on the item).
4. Displayed stats on gear changes once you re-equip any item. Once you enter a challenge mode, your gear displays reduced stats, as you would expect. However, once you take off one of your items and re-equip,
all stats on
every piece are reduced. For example: crit on my boots went from 377 to 346. What is interesting is that the overall stats in the spell tab are not reduced at all, and don't move around no matter what you do (except unequipping things, you still lose some stats but regain on equip).
5. When you take off all your gear, the stats on the gear in your bags returns to the initial "before un-equipping anything" value. Upon re-equipping successive pieces, each piece of gear loses stats.
These make me think the gear is sort of being averaged out, instead of each piece being reduced singularly. Since unequipping a piece that has no mastery marginally increases how much mastery you have, there has to be some averaging being done. Not sure how else to explain it.
I'll still do a stat comparison, but I'm not sure how accurate it'll be. The stats seem to be in equilibrium once you un/re-equip one or more items, so I'll do it using those values.
Edit: It seems as if the averaging idea is holding more water. Spell Power only exists on the main-hand weapon, and is not reduced at all if you use a 463 weapon (5152 SP). It also seems neck/capes with the same stats and same ilvl are reduced by the same amount.
Testing gems and enchants: removing a 320 haste gem inside the challenge mode and replacing it with a 320 dodge gem, net haste loss was 320, so gems are unaffected by scaling. Same deal with enchants. Zoning in and out with the dodge gem in did
not affect stats on any gear or total stats overall, so I'm assuming gems/enchants are outside the scope of the averaging.
Just finished the initial spreadsheet. Let me know what else I need to include. This is just a basic stat change sheet of my current gear (no reforges).
Note: This is in chicken spec. I'll do a resto one as well.
https://docs.google.com/open?id=0B3h...XhfVEZBUlVNUDQ