Autoexertion reservation

Autoexertion reservation is supposed to be 15% per Warcry right?
But i´m having an issue where it reservs different amount of mana from one item to another. Specifically the problem comes with an archdemon Crown with shaper / elder influence, on this item Autoexertion counts as being linked to 2 warcrys even when it is only linked to 1.

Using the same 4 gems (Autoexertion, general´s cry, tectonic slam of cataclysm, endurance charge on melee stun) on the Crown reserves 30% of mana, whether in any other item reserves what is supposed, 15%

I´ve checked if any of the mods i have on the Crown has a warcry tag, but they don´t (Hypothermia, Increased area of effect, Concentrated effect, 3% increased spell crit)

Thank you!

I understand what you say, but still there is something off, let me explain:

Autoexertion reservation:

4-Link On a 2 handed mace: (Autoexertion, general´s cry, Tectonic Slam of Cataclysm, Endurance charge on melee stun) = 15% Reservation

6-Link on a 2 handed mace: Same than above + 2 support gems (Pulverise, Awakened melee physical damage) = 15% Reservation

Following your sentence the second case should have more reservation than the first.

Last case.

4-Link on an archdemon Crown with shaper / elder influence Supported Mods (Hypothermia, Concentrated effect, Increased Area of effect).
Same gems than first case (Autoexertion, general´s cry, Tectonic Slam of Cataclysm, Endurance charge on melee stun) = 30% Reservation

AS said, i´ve checked and noone of the Supported mods of the Crown has the tag Warcry, then why is the reservation different?.

Appreciate your help, Thank you!

I see, awakened melee phys and pulverise don´t support general´s cry, but the supported mods from the crown do, that´s why the reservation is higher when using it.
Thank you!