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Basic Knowledge And Formulas___________________________________________
Clvl-
Level of character with which we buys items/crafts themQlvl-
Quality level.Can be never higher than ilvl of item, so if qlvl > ilvl, then qlvl = ilvl.
Few qlvls of items which we uses for crafting:
Light Belt - qlvl 7
Leather Boots - qlvl 3
Light Plated Boots - qlvl 20
You can found qlvls of all items here:
http://classic.battle.net/diablo2exp/items/weaponsandarmor.shtmlIlvl-
Item level.In our case for magic (blue) items it depends on character level with which we buys our items and on difficulty level
Normally item level of vendor's items is equal to character level +5, but on norm it's additionally capped (act 1:12, act 2:20, act 3:28, act 4:36, act 5:45).
The ilvl of a crafted item is equal to half the level of the crafting character (rounded down) plus half the ilvl of the input item (rounded down):
new ilvl of craft = int(.5 * clvl) + int(.5 * old ilvl of base item)Alvl -
Affix level.For an item this is the level that is used to compare to the level and max level as found in the prefix and suffix tables.
When referring to aprefix/suffix it is the value listed in the level column.
To calculate alvl of crafting item we must go through the following four steeps:
(1)ilvl = int(.5 * clvl) + int(.5 * ilvl)The ilvl calculated in (1) has to undergo two checks and possible modifications. First, ilvl is capped at 99:
(2) if ilvl > 99 then ilvl = 99Then qlvl and ilvl are compared. The higher number is used for further calculations:
(3)if qlvl > ilvl then ilvl = qlvlThe final step is to determine the affix level. If the ilvl is smaller than 99 - int(qlvl/2) then the affix level is ilvl - int(qlvl/2). Otherwise the affix level is ilvl*2 - 99:
(4) if ilvl < (99 - int(qlvl/2)= then affix level = ilvl - int(qlvl/2) else affix level = ilvl * 2 - 99.It's also worth noting that the ilvl, the quality and the properties of the jewel are completely irrelevant and don't affect the outcome at all.
Affixes -
Mods that our crafted item can have (not including fixed properties, which each craft have also)Crafted Items have 1-4 Random Magical Prefixes/Suffixes (but no more than 3 of each).
On top of those fixed properties, a Crafted Item can have from 1-4 standard Rare and Magic Prefix and Suffixes. These are generated pretty much the same way as a Rare item.
At ilvls 1-30, there's a 40% chance of 1 affix and a 20% chance each of 2, 3 or 4 affixes.
At ilvls 31-50, there's a 60% chance of 2 affixes and a 20% chance each of 3 or 4 affixes.
At ilvls 51-70, there's an 80% chance of 3 affixes and a 20% chance of 4 affixes.
At ilvls 71+, there's a 100% chance of 4 affixes.Remember that ilvl in this case means ilvl of craft, not ilvl of base item.
Rlvl-
Required level.new rlvl= rlvl of highest affix + 10 + 3*amount of mods_________________________________________________________
Common problems and misunderstandings_________________________________________________________
Low ilvl/alvl mit-
Lowest possible ilvl/alvl is the best, because useless high level mods can't spawnIt's
false because it's not the best, however most people seems to believe in that. I think it will be easiest to prove using simple example.
So let's consider caster belt with 3-5 rl and 24 fhr suffixes:
Code
Name | Alvl | Rlvl | Freq. | Stats
---------------------------------------------------------------------------------------------------------------------
of Regeneration | 10 | 7 | 4 | Replenish Life +3 to +5
of Stability | 18 | 13 | 4 | +24% Faster Hit Recovery
Since highest rlvl is 13 (in the german affixes calculator it's called Level-req.), then according to our formula, with just 2 mods, final lvl req of our craft will be:
new rlvl= rlvl of highest affix + 10 + 3*amount of mods = 13 + 10 + 3*2 = 29With one more prefix/suffix lvl req would be 32 at least, so we need 2 and only 2 affixes.
The best chance for this we have with ilvls 31-50 (at ilvls 31-50, there's a 60% chance of 2 affixes and a 20% chance each of 3 or 4 affixes)
On the other hand
we also want alvl 18 (or as close to it as possible, but never less) because it's needed for 24 fhr (in the german affixes calculator alvl column is called Level-req).
Since in our case
affix level = ilvl-int(qlvl/2) = ilvl-7/2 = ilvl-3,
it's impossible to have ilvl 31 and alvl 18 at same time 
Ok, so what is worse, higher alvl (more useless mods can spawn) or lower ilvl (only 20% chance of 2 affixes)?
Let's calculate chances for right suffixes with alvl 18 and ilvl 21.
[If you are not familiar with crafting math you can skip this part]
Code
We want to get 2 affixes, so we can get fhr first and rl after it, or rl first, and fhr after it.
For rl first we have chance equal to 4/51 and then 4/47 for fhr (we can't pick rl again obviously).
For fhr first we have chance equal to 4/51 and then 4/39 for rl (we can't pick any of affixes in fhr group again).
Total chance should be equal to (4/51)*(4/47)+(4/51)*(4/39) = (4/51)*((4/47)+(4/39)) = 0.0147192538 = ~1,47%
With ilvl 21 we have 20% chance to get exactly 2 affixes, and since this affixes can be prefixes or suffixes, next 25% chance to get 2 suffixes.
It means that chance to to get 2 suffixes with ilvl 21 is equal to (1/4)*(1/5)=1/20
So in our case it would be 1,47192538% * 0.05 = 0,073596269%
So we get0,0736% chance to roll 24fhr and 3-5rl with alvl 18 and ilvl 21. With the same calculations for ilvl 31 and alvl 28 it's 0.118% chance.
Our chances are 60% better in second case!Base magic item ilvl problems -
when you can buy right item only on Normal difficultySometimes you need to have magic item with ilvl over 20, but it's possible to buy it only in act I and II on Normal difficulty.
Solution is of course simple. Since we can't adjust ilvl of magic item, we need to change char lvl to ensure that craft ilvl will stay the same.
So don't be surprised if you will see 90 lvl char required in lld/mld guide. It's only because caps on ilvl of some items.
Wishfull thinking -
when something seems correct and you don't care about details anymore ^^Simple example can be Hit Points gloves with 20 ias. 20 ias have rlvl 35, so if it's only affix then lvl req of the craft should be:
new rlvl= rlvl of highest affix + 10 + 3*amount of mods = 35 + 10 + 3 = 48What we forgot about? 20 ias have also alvl 43 (and even higher ilvl) which means we will never get only one affix, always more.
Always remember to check everything
This post was edited by kukiFBK on Nov 13 2009 02:09pm