[color=#FF0000]This guide is no longer current or even possible to perform, it remains for reference purposes only[/color]
Here’s a guide to Perfect Re-Rolls:
1. Go to the lowest floor for the item you want to re-roll:
Wands: Floor 1
Staves: Floor 1
Gauntlets: Floor 5
Swords: Floor 5
Orb: Floor 1
Bracer: Floor 1
Tome: Floor 5
Skull: Floor 5
Swords: Floor 1
Hammers: Floor 1
Axes: Floor 5
Lances: Floor 5
Horn: Floor 1
Shield: Floor 1
Totem: Floor 5
Axe: Floor 5
Armor: Floor 11* for talent
Helm: Floor 20* For easy find w/ Talent
Ring: Floor 20* For easy find w/ Talent
Amulet: Floor 30* For easy find w/ Talent
Step 2:
Disenchant Item
Step 3:
Enchant item w/ 3-4 epic affixes, then re-roll to lv 100 with max stats (3 affixes are easier to re-roll to max than 4, but if you have a talent/+bolt/atk chance then having 4 affixes is the way to go)
Step 4:
At lv 100, the item will more readily be enchanted with max stat affixes; The final step is to enchant/re-load your save until the desired max rolls are reached.
My examples here aren’t all perfect rolls, but they are VERY close, except for the Orb, of which is PERFECT. 
Do note though that this method is meant to be easier than that of simply re-rolling 6 affixes all together… if you do probability on it:
Assuming you roll max for each stat at a 1/5 ratio:
Re-rolls to get max stat of 1 specific stat of 6:
1/5 = 5 re-rolls
for 2 specific stats:
1/5 * 1/5 = 1/25; 25 re-rolls
for 3:
1/5 * 1/5 * 1/5 = 125
For 4
1/5 * 1/5 * 1/5 * 1/5 = 625
For 5
1/5^5 = 3125
For 6
1/5^6 = 15625… as you can see, it’s best to just go with 3 affixes *Exception: +extra bolt/atk chance = 1 or 2, meaning you will roll max 1/2 of the time; with that in mind, 3 normal affixes + bolt/atk chance = 250 instead of 625… So you can see why I place the cutoff there… The probability assumption is based off of my countless hours of re-rolling and re-tailoring my character several times; The 1/5 ratio is based off of 300% luck on equipment and 100% bonus luck from challenges. It seems that 1 in 5 re-rolls on average yields 1 max affix.
[size=150][color=#FF0000]Edit: Unverified: Tip: As a rule of thumb, and as a person who’s re-rolled for hours on end because I’m a perfectionist; I can tell you that it absolutely seems that enchanting depends on the first affix on an item. i.e. if you have attack speed first, usually, crit chance/crit damage follow, and vise versa, this works with +dmg/+%dmg/+%elementdmg/+elementdmg(although avoid flat element damage at all costs, it’s a waste); but if you roll luck first, it is A LOT harder to narrow down affixes you want to roll, and if you roll a talent or +skill first, then you keep rolling +talent or +skill afterwards; not sure if this is intentional but it makes re-rolling a LOT easier after I found that out a long time ago; It does seem intentional and it does make sense, but maybe it wasn’t an intentional mechanic to the game, hopefully me posting this doesn’t change the enchant mechanics though 
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[attachment=0]Perfect re-rolls.jpg[/attachment]
