Life, Mana, Stamina

- boostable, non-boostable, maximum


Table of Contents
- [1] Formulae
- [2] Life / Mana Boost - Items
- [3] Jah / Sur vs Perfect Ruby / Perfect Sapphire


[1] Formulae

The game calculates your maximum Life, Mana, and Stamina displayed on your character screen as follows,


Source : Things you SHOULD know about Diablo 2 , http://www.battle.net/forums/thread.aspx?fn=d2-general&t=1312543 (section 47)

Boostable Life / Mana bonuses

• Life / Mana gained naturally per level-up *)
• Life / Mana gained from points spent in Vitality / Energy **)
• Life / Mana gained from the item bonuses, "+X to Life" / "+Y to Mana"
• Life gained from a Potion of Life ("+20 to Life"), quest reward, "The Golden Bird" (Act III)

*), **) Class-specific values : http://www.battle.net/diablo2exp/classes/

The sum of the default starting Life / Mana on your character and the above bonuses is the Boostable Life / Mana, used in (1) and (2). Similarly, the sum of initial Stamina, Stamina gained per
level-up, from points spent in Vitality, and from items having "+Z Maximum Stamina", is the Boostable Stamina, used in (3).

Life / Mana / Stamina Boost (%)

• Battle Orders: +(32 + 3*slvl) % Life, Mana, and Stamina, based on skill level (slvl > 0)
• Increased Stamina: +(15 + 15*slvl) % Stamina, based on skill level
• Vigor: +(25 + 25*slvl) % Stamina, based on skill level
• Werewolf: +25 % Life and Stamina
• Werebear: +50 % Life
• Oak Sage: +(25 + 5*slvl) % Life, based on skill level
• Lycanthropy: +(15 + 5*slvl) % Life, based on skill level

Each of the above Life / Mana Boost (%) skill bonuses and "Increase Maximum Life X %" / "Increase Maximum Mana Y %" from items (see [2] below) are cumulative. The sum of skill bonuses
and item bonuses is the Life / Mana Boost, used in (1) and (2). There is no item based Stamina Boost (%).

Non-boostable Life / Mana bonuses

• Life / Mana gained from Vitality / Energy item bonuses (e.g. Infinity, The Oculus, Lidless Wall)
• Life / Mana gained from Character Level based item bonuses (e.g. Fortitude, Harlequin Crest, Wizardspike)

The sum of these bonuses is the Non-boostable Life / Mana, used in (1) and (2). Unlike Boostable Life / Mana, they are not enhanced by Life / Mana Boost when calculating Max Life / Mana.
Non-boostable Stamina is granted by Vitality bonuses from items (see the attribute point returns in the Arreat Summit link above).


[2] Life / Mana Boost - Items

Legend: [R] rune, [W] rune word, [C] crafted item, [S] set item, [U] unique item

Increase Maximum Life 5 %

• [R] Jah Rune, helm, tors
  [W] Enigma ('JahIthBer'), tors
  [W] Dream ('IoJahPul'), helm

Increase Maximum Life 20 %

• [U] Doombringer (Champion Sword)

Increase Maximum Life (20-25) %

• [U] Chromatic Ire (Cedar Staff)

Increase Maximum Life 27 %

• [S] Sazabi's Grand Tribute [Complete Set]

Increase Maximum Mana (1-5) %

• [C] Caster Weapon

Increase Maximum Mana (2-5) %

• [C] Caster Boots

Increase Maximum Mana 5 %

• [R] Sur Rune, helm, tors
  [W] Bramble ('RalOhmSurEth'), tors
  [W] Dragon ('SurLoSol'), tors
  [U] Arachnid Mesh (Spiderweb Sash)

Increase Maximum Mana 10 %

• [U] Darkforce Spawn (Bloodlord Skull)
  [U] Lidless Wall (Grim Shield)
  [U] Silkweave (Mesh Boots)
  [U] Suicide Branch (Burnt Wand)

Increase Maximum Mana 15 %

• [W] Heart of the Oak ('KoVexPulThul'), staf, mace
  [U] Atma's Wail (Embossed Plate)
  [U] Gloom's Trap (Mesh Belt)
  [U] Wizardspike (Bone Knife)

Increase Maximum Mana 20 %

• [W] Memory ('LumIoSolEth'), staf
  [U] Skull Collector (Rune Staff)

Increase Maximum Mana 25 %

• [U] The Stone of Jordan (Ring)

Increase Maximum Mana 40 %

• [U] Frostburn (Gauntlets)

[3] Jah / Sur vs Perfect Ruby / Perfect Sapphire

Suppose you have decided to socket either Jah / Sur or a Perfect Ruby / Perfect Sapphire in your helm (or body armor), for the additional Life / Mana they provide. Question is, which is best;
Jah or PRuby ? Sur or PSapp ?

Since the numbers involved in both cases are the same, viz +5 % to Life / Mana Boost vs +38 to Life / Mana, let's just focus on (1). The same reasoning applies to Mana, using (2).

We are comparing Jah (+5 % to Life Boost) and PRuby (+38 to Boostable Life), thus Non-boostable Life is irrelevant here. Setting X = Life Boost (%), not including Jah, we have to compare

1. "Jah": (Boostable Life) * (1 + X/100 + 0.05)
2. "PRuby": (Boostable Life + 38) * (1 + X/100)

Most terms cancel and we are left with Boostable Life * 0.05 vs 38 * (1 + X/100), or, equivalently,


In particular by (5) and (6), if Boostable Life =< 760, then PRuby is at least as good as Jah (better than Jah if "<").

So, what you do in practice is, determine X from your skills and items. Next, determine your Boostable Life, either 'going backwards' from (1) or by adding up the contributions to Boostable Life
outlined in section [1] (remember the initial Life). Then compare and conclude from (4), (5), or (6).

Sur vs PSapp is handled in a similar manner (Mana Boost, Boostable Mana).

You have some of the best random statistical guides, kudos.

like always very informative and deep

good work

This should be stickied!!!

[] ty put in my carebox

This post was edited by Pari on Feb 26 2009 04:22pm

magefists?

stop trying to get a sticky

"ok" ^_______________^



As long as people understand it and find it helpful, "sticky" status does not matter.

This post was edited by Faelwen on Feb 26 2009 09:12pm

bump this

Bump !