Reduced Mana lvl 21 doing same effect as lvl 20

Hello

just bought a Reduced mana lvl 21 to use at my helmet linked to 2 auras + herald

at lvl 20 I have 632 of 710 mana reserved (78 left)

with the lvl 21, even removing the helmet, re-socketing the gems (just in case)
I have the same 632 mana reserved (out of 710, and 78 left)

Any explanation ?
Bug ?
WTS - IRL Superior Determination = PRICELESS

yeah its a noobtrap has something to do with rounding
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hows it ?

mana multiplier differs from 71% to 70%

that should be applied at the reserved mana % of each aura, 60% for grace and hatred, 25% for herald of ash

Think that even if the 70% of 60% (-8% from passive) would result in a number higher than 1 (mana) point

I was expecting to have 1% mana reserved for each aura, 3% less total,
21 points out of 710 off free mana to be used

can someone explain how it comes to 0 ?
WTS - IRL Superior Determination = PRICELESS

0.71 * 0.92 * 0.6 = 0.3919, rounds to 39%
0.71 * 0.92 * 0.25 = 0.1633, rounds to 16%

0.70 * 0.92 * 0.6 = 0.3864, rounds to 39%
0.70 * 0.92 * 0.25 = 0.161, rounds to 16%

This is why you see no change.

Game rounds to nearest % for these calculations.
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You can see a difference if you pick up all the mana reserve reduction nodes on tree, put your level 21 reduced mana in a +1 gem 4L item, with level 20 blood magic, and 2 60% auras, you can see that you will be able to cast both auras on life. The same can't be done on a lvl 20 reduced mana.

(also works the other way if you have a lvl 20 bm and lvl 21 bm)
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"
zSavage wrote:
0.71 * 0.92 * 0.6 = 0.3919, rounds to 39%
0.71 * 0.92 * 0.25 = 0.1633, rounds to 16%

0.70 * 0.92 * 0.6 = 0.3864, rounds to 39%
0.70 * 0.92 * 0.25 = 0.161, rounds to 16%

This is why you see no change.

Game rounds to nearest % for these calculations.


However, none of that reflects how the game actually works. :P

First off: Path of Exile basically always rounds down.

Increased/Reduced/More/Less applies to the Base Reserve, which already factors in Supports. As such, Passives and gear bonuses do not matter when determining RM's effect. BM/Empower Supports do.

This is how Reduced Mana at level 20/21/22 applies to 60/40/25% Reserved, no other Supports:

60 * 0.71 = 42.6, rounds to 42% Reserved
60 * 0.70 = 42% Reserved
60 * 0.69 = 41.4, rounds to 41% Reserved

40 * 0.71 = 28.4, rounds to 28% Reserved
40 * 0.70 = 28% Reserved
40 * 0.69 = 27.6, rounds to 27% Reserved

25 * 0.71 = 17.75, rounds to 17% Reserved
25 * 0.70 = 17.5, rounds to 17% Reserved
25 * 0.69 = 17.25, rounds to 17% Reserved

A level 21 RM never does anything under normal circumstances. A BM Gem mixes things up a bunch, but you can probably figure that out for yourselves. :P


The 8% Reduced Reserve then applies as follows:
42 * 0.08 = 3.36, rounds to 3
42 - 3 = 39% final Reserve

Calculate the reduction, round down, subtract.
Last edited by Vipermagi on Oct 1, 2014, 7:23:20 AM
I think you need this:

http://poe.mikelat.com/#
Question is: Why the hell is the Reduction % Integer !?!?

Could be like, mana reduction = 0.3919% or 0.3864%,
and the only mandatory integer would be the Mana or Life points rounded down

think it would be more "fair"
WTS - IRL Superior Determination = PRICELESS

Meh, I was leveling 6 reduced mana gems at once to vaal them. Already tried 7 level 20's with no luck.
Guess I'll stop with the next 6:).

Although I'm disappointed lvl 21 brings no difference, I am glad someone else found out so I can save some time.
"
Improved the mana reservation system so that multiple percentage reservations don't round separately. This means that a 60% aura can now never prevent a 40% aura from being reserved.


Quoted from 1.2 patch notes.

For 60+40+25 (your case I think):
before 1.2:
60*0.71+40*0.71+25*0.71 ~= 43+29+18 = 90% reserved
after 1.2:
125*0.71=88.75 rounded up to 89%
125*0.70=87.5 rounded up to 88%

If my understanding of the patch notes is correct, there should be a difference in mana reserved. So, where am I wrong?

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