Reduced Mana Cost of Skills & Mana Reservation

Hey there,

So in the skilltree there are 2 kind of mana cost reductions: Mana cost reduction of spells and mana reservation costs. My question now is, whether the reduced mana cost for skills also affects auras. And if so, only the ones with "x mana reserved" or also the "% mana reserved".

Thx,
greetings.

mana cost reduction from passives doesn't affect mana reserved at all. The reduced mana cost support gem, on the other hand, will reduce mana reserved.

The "5% reduced mana reserved" means, when an aura would reserve 40%, now it would only reserve 35%, right?

(Other option would be: 40 - (40*0.05) which would be stupid ^^)

No, it really means 5% reduction from the reservation, Chris (if I'm right) had explained it multiple times.

as I understand it, reduced cost of skills affects skills, whereas reduced mana reservation affects auras that reserve a percentage. at least that's what I managed to gather from the forums, and I have no idea where the auras that reserve a fixed number fall into, or maybe those are not affected at all by either...

I would also like an answer on that, or would do some testing right before the next patch (which would wipe the tree so it's like I never did it) and I already have 10 unused passive points so if not now, in a level or two I could test both and not use a single respec point or regret orb

reduced reservation is a percentage of your reservation. meaning it is 40 - (40*0.05) = 38

they are much more effective the more you reserve, so if you use a gem (30% reduced cost, which works on all skills and auras as far as I know), and 20% (4 passives) that are available on the passive tree, you could actually run the 5 auras that reserve percentages, to a total of 190%, and have it reduced to 95% (because you reduce 50% of those 190).

reduced mana cost passives don't affect aura reservations.

reduced mana cost support does.

It modifies the reserved amount multiplicatively. Ie, 5% reduced reserve with a 40% aura is 40*.05 = 38% reserved. This is not the stupid way to do it, its the only way that scales with multiple auras in a non-stupid way.

Ok thx for that important informations ;)

Just wanted to add that some builds that use the entire mana pool for auras can allow you to ignore boosting mana completely, and instead get the reduced mana reserved nodes . you would then be able to run 3 auras where 2 used 40% and the third used 30% (110%) and instead it would only use 99%.

My 2h shadow uses them with blood magic support gems on skills so I get three % auras and use my health for skills.

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Kirisute_Gomen wrote:

Just wanted to add that some builds that use the entire mana pool for auras can allow you to ignore boosting mana completely, and instead get the reduced mana reserved nodes . you would then be able to run 3 auras where 2 used 40% and the third used 30% (110%) and instead it would only use 99%.

My 2h shadow uses them with blood magic support gems on skills so I get three % auras and use my health for skills.

Yes I know this. I am planing something like this, but to do so, I need to know how everything is handled by the game. Again, thx for the answers.

HOW THE REDUCTION WORKS...
Let's say you have a gem that has 60% reservation of mana
you have 5% less
another 5% less
and then a mana reduction gem for 50% less... just for easy numbers...

START by noticing that order here does not matter at all, you could apply these in any order and get the same result... but here we go...

60% gets multiplied by (1-.05) or .95 since 5% reduction occurs...
60*.95=57... the aura now takes 57% of your mana
then another 5% so again times .95
the gem now takes 54.15% of your mana
then another 50% off so 1-.50 = .50
54.15*.50 = 27.075 or 27%.

THERE...

you multiply each individually and it correctly explains the reduction, which makes sense, since then you can never have free auras