Not sure if this is a bug or intended. But this is an observation with mana efficiency I have noticed on several skills.
Now I am lead to believe at 100% it effectively halves’ the mana cost. So 100% efficiency on a skill cost of 40 mana would equal a new mana cost of 20! If that reduction is over 5 points in the node, eg 20% you would expect a mana reduction of 4 points. So as efficiency goes up 20%, 40%, 60%, 80% and finally 100%. The cost should go down in 4 mana steps, (40 base cost) > 36 > 32 > 28 > 24 > 20.
However I am seeing some really weird numbers which don’t make sense.
Lets take Abyssal Echo as an example.
It has a base cost of 35 mana. Half of that is 17.5 round up is 18. However as I put points into the node Abyssal Remains up to maximum. The mana drops per level are as follows.
20% = 30 a reduction of 5
40% = 25 a reduction of 5
60% = 22 a reduction of 3
80% = 20 a reduction of 2
100% = 18 a reduction of 2
Why the weird steps? Surely they should go down in steps of 3.5 mana ( rounded up, and adjusted to meet half way point.
So the reduction should be 4 > 7 > 11 > 14 > 18, so mana cost would be (35 base cost) > 31 > 28 > 24 > 21 > 18. That way the reduction is nice and smooth!
Is this working right?