Difference between "% Less mana reserved" and "% reduced mana reserved?"

Well, kinda sorta how it works; Reservations are funky.


The game multiplies Less and Reduced Mana Reserved to get a single multiplier, and calculates your final Reduction using that result.
(100 -Red) * (100 -Less) / 100 - 100 = Total %Reduction

30% Reduced and 60% Less works out as follows:
(100 - 30) * (100 - 60) / 100 - 100 = 70*40/100-100 = -72%

Lazy mathematician version: 0.7*0.4 = 28% remaining, ergo 72% reduction.


While we're on the topic:
Supports pop up in an entirely separate calculation prior to Reduced/Less. The result is rounded down. This also means a level 21 Reduced Mana doesn't do much for 40/60% Reserves on its own:
60 * 0.71 = 42.6, rounds to 42% Base Reserved
60 * 0.70 = 42% Base Reserved - same result as lv20

The reduction calculated above is applied to this value as follows:
42 * 0.72 = 30.24, rounds to 30
42 - 30 = 12% final Reserve

If you add up your Reserves like that I will kill you, some day. That does not work.


Using your numbers (lv21 RM, 34% Reduced):
60 * 0.70 = 42%
42 * 0.34 = 14.28
42 - 14 = 28% per 60% Aura

40 * 0.70 = 28
28 * 0.34 = 9.52
28 - 9 = 19% per 40% Aura

28+28+19+19 = 94% Reserved.

With MC:
0.66*0.4 = 0.264 -> 74% reduction*
42 * 0.74 = 31.08
42 - 31 = 11% per 60% Aura
28 * 0.74 = 20.72
28 - 20 = 8% per 40% Aura

11+11+8+8 = 38% Reserved (Sefriol got 36% here - proper procedure means proper results)


If you used a level 20 RM instead:

60 * 0.71 = 42.6, rounds to 42%
42 * 0.34 = 14.28
42 - 14 = 28% per 60% Aura

As I had already stated, there is no difference between a level 20 and a level 21 RM. You'll still be reserving 38% of your Life pool, but won't have spent tons on lv21 RM Gems that don't have any effect.



* = Total %Reduction is, for some reason, exempt from the normal rule of "always round down"; it instead rounds to nearest.