Skills Cost Life instead of 30% of Mana Mastery with Non-channeling skills have -# to mana cost

[fmorel002]

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What is the value from the calculation in-game?

I run 3 items with Non-channeling skills have -7 to mana cost, for a total of 21 reduced mana cost & the Skills Cost Life instead of 30% of Mana Mastery.

In game, it shows me a mana cost of :

• Toxic Rain setup : 11 mana
• Despair : 9 mana

What is the value from the calculation in Path of Building?

I run 3 items with Non-channeling skills have -7 to mana cost, for a total of 21 reduced mana cost & the Skills Cost Life instead of 30% of Mana Mastery.

In POB for this skill & setup it shows :

• Toxic Rain setup : 5 mana
• Despair : 2 mana

How to reproduce the issue

With the POB check for the Calculation part and select a skill setup (Toxic Rain or Despair)

Character build code

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4uIro7_XP-qdTkZRnEG6fpnoSBhlvesh5H7GQTjWAcp4q-5V2PsQBd_Gyjg7fGWYvqfAFUpm-hYjBAvMTccUnk2pJ5SH4Tb4BYdaFBycb9mCQoyxPOR7mEkmWC-fTs7-K0OYvfxTX317ZTDaOxuOQkhAsvSVgXu_u4n0M-X9sed5qUGMq2KlGkXMbdxWnlFMuwlj3CYyyl4Z_CddrJVtNr3B2Ki9msbIk_oABD8xYr-ivoSoDNO4ovwCYSOLy4KuMxL5SSPlxxmNYh--3tjbFT0_6awSmSnD3EXsJz1rnawYI9BXYQY9ZBTEGmSMIDUuIGcK_Em-k0Wf6clyS7_QmwWhajAS_RdSpl22VZpMuRZaIfCTEORJCPokBHsSojpYnueITbvHC-z-KpS3YNHXgyBSvY9BEniBjB5buwtJiWWbkINgn9vKJRZxlU5sIFVgvuO4FqxNUyjqORAIMXY8y7ctm0FkdhGTZsPauV03cLP3u69PAI4TsOEXvGYSVSJ6B_rUbThj9nKrHjLrtlyH74n6nWGxozY3jJ4-B2TgwvK1kRxFajgxToPMuA-ygVGUDOlfyBIWaZEs0OJ-IoeQ2BvXrkx6B7rqyB7rUNnUwY6FFMGSYVCPdKTyfF-aECAcobggQmLQmfQY95iFBIOUFPITJOCjL5sei9V1iHoY9JHoA_Ig8yKZ18vxYJykKtWlxCQe9zorlzV0q5-H5EcDjfsBZCvGIRQ0xie9JRtWb4-3avsgTpLxCDzjX1yhdIFCQTpR4ZWvJHjE64G8hXgaGflO1l55aAiCA7aqi30QQPmmExASLKtdyBVJXf8c-a6jOCS9xMK-A6HIsSA8MWH6XLrUYR42mVTUIR5k5Awr37axhjc9iGTMa-jfQr1yC7pewWWC8Mo40f92TurRjDWjGaE_6RcBgp_PA4Y-zWE4Svvh4rQhqKthJ7W48AJT_f2heoCIDCP3XlCmvyglYPSlPvfaeyFs_W3DFgCyoBmHXoNk-f307H79Jmn4mOrgfGGLf7NwsQRCPAlhtds2a9r2xd7J2UFvP86yeKiPrBvXQagdQH6WSTuMbKCMd_IrJG91y8XUhgqSepBC-Zgq5TsQh6jpIuyZpsuUKUwPKnlbEGZyk1q26wrfdjwHe8JDpt2MPqxuuTVDxc2opA21EWESYL16y0yP8Sf9neGN852yxe0NmcMiIfNFQj6II23GmfHzOICgtkDOpzJRdSkTRzhCr31BCHct6piO49vIkr6wdY3t264wbSlMRW3PsTwfCipwIi6nUnimasZ41CJl2hQyspYJ2Wpff3-acMUC73ydxYnmVKaD3qmSdxNjX4VZXZYSRONzJKW0qUkk9i2PuZ50hM-ZIFJxHXWVJFQR5VPqYuFgl7gCOZRKd746wHUzFc3A-4LkPhDqKxXdZoNemYlX3q84X2sUB2x7tZQZs117li6nRbr8gtIWN0na3eS0AAHsR473759VW0tX31vpqeayO5HfVRg2V56nHJ1eE-5DgPY8W3DiupCueZbJGUGepcCzIcWoQhCNiVDCN8GsIG2TLhSgDWuhePHKw6K59LC5bOlRVL_bjLB_2tqzF4l2L5LhJM3-B2JE-r-pcQL0gmxOxnuQAUMq0ch-XR_5RLocAoKEGGF6ikpq2kK5LiVQyiBs-4TZyEPStrlwGKS9VJhQzVOo25vZD5Toi2VszckY16VYbWyZE25RNP9pQkVmU6of3p_9_OEI-NGVsX5YCdmmfs3Lfnzf6HcwJB3uYsgJEVQNyiF5BQgCc1xwb4hTi0DdQBRxELg-2-Pct6WJPEeB2AVvejRrJj9cTx938n9Gv-7wmiJ9gUgzCURmw5CrJ0FVNTh3u6jxyhxO206WLqwIe1ZDdbPHQCXqC4ry_LV8gUeVe-qUMU9sytHBN47dAEqzP1BD5_PVTw0Qs1lmUVmMtuvqvRM6u_gVqqkZxl4Yxi749NR4py2oCu-gzx9Z6qMsdQmE_SQEMpesq7m24vvL_sXeuTZesFOwx7n1hDk2fduT4MV1kxB7FpOWi8Cd2xbjkBJYyvY9ybnnE2RDWoCgUkeMwfIjtmfNVeMt1dhOXo3t7Bv7tQXF-VzpThquPsyzrOkCqrdGai3HyvR0SxKZeikgUaQNpeVvxvIWCnpRH-tU3sVu3v-QTu8g0K98gjAwHIeqkZeB0B1mO9j3TN3mINzmju1zS2BTSUYo8wkRrpIedRxqglMjXCCluIMh6RUYN6XO61Jt7dpOV-dVnFXd1U96cb7AZj11M2Tk1YtbYjcTO2o-yq5q-RzaZY_SubzfBdqZfl-4t3cwuHZhuQfLOdBTyrvdecldNEn10-UZF-_jaEe_iihS5Ymxoh87kHfK2BGaUP6OzMKT6ldB_3A9nQpkRBblONcy055fR4DgTltyrsFpirOXpuP8FRF107aJksp0XVNQi0NohkqY25JyhqjHKQRqAX9NX2CHuD6Vlg_VnASTJp4PAKjpUCzaCNBtZm72eKNXtzfUOwqqLBJsjJBZMKtyS0NzVsXes-FwDPnbRFtQ_rIqbVx-nGh3UlhxagS-frBTtf8qqEUUpi2_Ym_rckIyz7Tg0pnMI_5pxrvQJBY2BON4aBxDydXLD9CfSJAz-La0V2SPoCUblZ8fdwIFYY1OIPOZZzsQVzATWCmTea7klml5hBOo86FeZaZpg5ilUJyApxRYWJwzRzqUUbdT7Onv5P_qpkOaHlL_PIM2krxXchb5cCcz1MMoSMBXIki_0lC_87HZBWjkb-UDMVA8nc_78uSs7Oe_ILT2cOqFTRa0B1Fe3-o3kTbqXoK61L1ovomoPfl8-zL94e-0cbMFxn3phODm9IajUIuwt5_E0htAFC5OmesWFjiOugVbUHMo7HDlO9JkxJaWdKE4VpAnOQjrxrWrfBdKN4dBQkUYc5BtIqQQxHlLKdp0duaS_ordan0vbKu7IaGW_jOhHQys3rYxH0X5mR0WraBqQjoU_9dF4YU2xxfYXF-O9CNH42acRL2LWPdrYgi0_bmoCqbkg7f0LWm7CknPFx4mCGFObF95nvTBYUIej7iny13PNH2dN_rMdDmYoKTzUbUtkiIwEbu9cfeC5rZ2FmU6_7pVue1w_tj-MH9kApXt6QRvlt3XHRMMvdA6f2R_z7M7sbDTArn_UFbtKzCFcQCig8AZAlhqHASJq4uWhv71kz7cq78r8XGQJxZhDRdpYsv2kGUJaSrqKcy5wJ5nOcyzXCYcSbHkAvJB7ElsUu4KiwqHC3CYBEEx1Pq4r96w6Rv7RrO6ZHMP919QvrBTgkmjwdI099VL0ur4WJrH3umr2tPcrGdPkOVoFE5muUGVR-hVkCV5kR79Zz3aW2h31gJ_dyFVCDxCFnkex6PeTTyS3x95O0vnf9gXvk0FcW0slOsIV1DFFPGRAjNRRD-eEIxTbErHdCmFaOpJlzBJiWraDFnm7bDdHvjKUrfp7ahY4h7ZglD8tNtrCdY_3N7z3J69aIeKyhfh1yDqQfWqd2NF0w6-TJzZlga95bVtTwOq2yp1ICgLgZCLLIZsCnWKbxNJXUZNX3LPc6SrlOM5lsspUpaLPMEtiSzf1EWOmLfVqX-zZu5tf-cEihjdQmsUMlbTlsmSbQJlVJ_bokCs9qcrgILEY2sWi_PKxYGbNnyrfgVn7hbzN7_OnvH8FTfI_FvMVr8vsW3raPNFimGc5ftjr5wP_XO9obV4fXz1coHp1tkpN20Ys_eGTXHMp3DyzT_GnjOBBRQa5eZdNqPwNAEVZvP4eAX8ogFV23Jsd2Uzf8nF_NB0haGnhJ7BfkkDb4DGYob4BhjiG2BoLRqLGEKLCOW3zjygMr_DvKCYbzw0apvOqxHXMW-yAZHiTYljFYMtTg13EugKq5U_ewZ4ZQo1FyXWG5NsSgFsA9aANrDA0AbmQVc0hRm4eJaTWsUAFi5JugEBrh51aqpnz-KfPJd__Mw1vNoEpsfkn2ODRX7yHAqLFzZ7NgW-qdiLNuVjcMeYV56-qse82oGsjjGvsO16FkjWkyN9tjWwzZjlKqujeD5fYx6v60zJBnwSeea6ps_ER5tRwNrBdmWXXGOYd8OoGYfVdW4182DriJU9199vSC90Uw6Kd3RQ5XHOuoOqnfDs6KCWzoSs67xrOkVPIeoeZcMK-Hr-DW9GjRsLWJuoXOl6PNWEaXcSfz1AWeuJf0NZD3t2nHt-pOSrepQZPF3LAz0esGhgVW_fyI9D57-HGEd-cFv9jqSrBnHoqaQkrfTmr-I39qa_cCjqPxu-CF7_rF71EpUKiTyBUxlZBV__JdO2Maofl61w2HKU8hd54zDM-3x1hpYjTn-Oq0LgYjlC8zeAawNVPxxTivz1yyuZDS79_NcyYc38s_f_qbN8Sw==

Screenshots

With the mastery & -21 Mana cost :

Without the mastery & -21 mana cost :

[fmorel002]

I think I found that the difference comes from when the 30% is calculated.

In game, it seems to be after that -# mana cost is applied. If I remove the Mastery, and my gear that gives -mana cost, my Toxic Rain setup is 37 Mana cost. If I add mastery it becomes 25 Mana. Thus, applying the -mana cost should give 4 mana cost, but in game it gives 11 mana cost.
What is done in POB : (total mana cost *0.7) - # mana cost craft = (37 * 0.7) - 21 = 4.9 (goes to 5 in POB)
What is done in game : (total mana cost - # mana cost craft) * 0.7 = 11.2 (goes to 11 in game)

[mortentc]

I find it really strange that the cost of toxic rain shows 11 mana, 11 life with the mastery, but 16 mana without. So the base cost of your toxic rain is 11 mana, and you have a total of 340% of mana multipliers from your supports, resulting in 37 mana cost. After the -21, this is reduced to 16.

If the new mastery was applied to the mana cost of 16, it should end up with 11 mana (16 * 70%) and 5 life (16 * 30%).
Instead, it looks like the life cost is calculated before the -21 is applied, giving 11 life (37 * 30%), and then the reduction in mana cost takes effect after the -21 is applied, resulting in 11 mana ((37-21) * 70%).

This seems very incosistent, and might even be a mistake on GGG's side. You could try and create a bug report on the forums to raise the issue: https://www.pathofexile.com/forum/view-forum/bug-reports

[trn7]

Hi, I noticed a similar error and wanted to create a ticket, but it looks like this is how GGG is designed.

I tried to reduce the cost of the Malevolence сost at the expense of Divine Blessing +Inspiritation +(+hp/-mana)30% mastery, but I was faced with the fact that the total amount in the game is different from what I had in pob. I also use Petrified blood, as a result, it caused me a lot of problems with my build.

And this is strange, because the activation of petrified blood reduces the HP-cost, which in principle cannot be: https://i.imgur.com/380y5mJ.png
what I used for the test: https://pastebin.com/nMQnC4z2

And I absolutely do not understand that there is an "additional life cost", in total everything comes out right, but why are the values after the hundredths placed in a separate item? I think the problem is that this value("additional life cost") is used after multiplication..

Please check it, thanks!

[Gondawn]

Hi
Came across the same issue as well.
In game: https://cdn.discordapp.com/attachments/753680247068688414/1096767752192151582/image.png
PoB: https://cdn.discordapp.com/attachments/753680247068688414/1096767752519290993/image.png
I hope it's actually an in game bug, and not PoB bug. Does anybody know if it's been reported to GGG?

[mortentc]

@Gondawn , yes, I reported it two days ago on the forums: https://www.pathofexile.com/forum/view-thread/3369075.
Even if it is a bug in PoE, I think they would most likely change it so the mana cost stays the same, but the life cost is lowered. If that's the case, PoB would still need to be updated to show the correct values, but we can't know for sure before GGG responds.

[fmorel002]

Thanks for your time and help @mortentc & @LocalIdentity