Manaforged - skill costs and order

Hello

I have some manaforges set ups and somethings seems wrong as always.

My burning arrow costs 11 Mana with Inspiration support.
(Thats the price the gem shows.)
I have two rings with non channeling skills have -7 to total mana costs.
So it should be free to use. But it costs 4 Mana.

My Tornado shot in the same item costs 9 Mana and is free to use.
Why? It should be 2 mana, right?

So beside that, is it correct to put the cheapest ones rigth after manaforge?


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I use Far shot & Long shot.
So 2x60% more damage with distance.

How would Point bank work with that?
Since there is no % on the "less damage as the projectile travels farther"
I would suspect that the distance should be the same. But how much do i lose?
Could this 3 work together?


Sincerely

a veteran noob

You might need to check in PoB for how the mana costs are being calculated.

Refer to this graph and choose whether you want to take Point Blank or not: https://www.poewiki.net/wiki/Far_Shot#Point_Blank. Note that Longshot doesn't affect this because it doesn't have a penalty like Far Shot does.

Take out the Inspiration. Put in Lifetap instead. Congrats, it now counts as costing 0 mana and will therefore fire literally every time it is off cooldown.