[SOLVED] Correct calculation of: %-Aura, reduced mana reservation, reduced mana gem

How is the aura mana reservation exactly calculated? I haven't found the exact formula.

I have 41% reduced mana reserved nodes from skill tree, 74% reduced mana reserved from gem and 506 mana.
For a 60% aura the tooltip displays 26% reserved. For a 40% it shows 18%.

I assumed the calulation is 60%*0.59*0.74 = 26.196% and s 60%*0.59*0.74 = 17.464% and then rounded, which is obviously not true.

I guess there is some rounding done in between or a mapping to the actual mana pool, probably before the reduced mana gem comes into play, but im not sure how exactly.

Btw: my goal is to run 4 60% auras on mana and it is pretty close...

Thx

EDIT:

If you don't want to do the math, use this tool: http://fogz.mine.nu:8080/poe_reserved_calc/

The correct calculation for the example above for a 60% Aura is:

60% * 0.74 = 44.4 -> 44% after reduced mana gem
44% * 0.41 = 18.04 -> 18% reduction from reduced mana reservation nodes
44% - 18% = 26%

Same for 40%:
40 * 0.74 = 29.6; 29 * 0.41 = 11.89; 29 - 11 = 18%

are you trying to troll?
there are no 40% auras anymore

Purity is still 40%.

"

ciel289 wrote:

are you trying to troll?
there are no 40% auras anymore

Before calling people trolls, maybe you should actually be knowledgable about what you are talking about.

60% should be rounded to 27% afaik. Maybe it's a bug.

Beysl,

Do you have either a PRism Guardian or an Alpha's Howl?

If you equip a 60% in prism guardian, what is the number on your skill slot? Then what happens if you put Alpha's Howl on?

What happens if you put a reduced mana gem in your item before you put the aura gem in?

Might be rounded each step:

60% x 0.59 = 35.4 = 35, then 35 * .74 = 25.9 = 26

40% x 0.59 = 23.6 = 24, then 24 * .74 = 17.76 = 18

That's what i thought as well, because then the values round up correctly.

But i just tested the tooltip value without the gem: 60% * 0.59 = 35.4, but it shows 36%.

Probably we have to calculate it with the actual mana pool somehow.
Maybe the tooltip does also calculate something slightly different than the actual reservation value.

Can anyone help me? Is this even the correct forum for such a question?

Still no help? Im probably in the wrong forum.