It looks like that the tree-node “Calm” (x% Increased Mana Efficiency) of the skill “Maelstrom” doesn’t work. The displayed Manacost is not reduced and i pay the Mana that is displayed on the skill.
Calm 0 Points: 30 Mana (Base)
Calm 1 Point: 27 Mana
Calm 2 Points: 27 Mana
Calm 3 Points: 27 Mana
Calm 4 Points: 27 Mana
Calm 5 Points: 27 Mana
Edit: The +% Base Spell Damage from the Shaman passive “Rune of Awe” is not applied in any way. It’s not displayed in the character sheet as well (and not just a display bug. I tested the damage numbers -> does not work).
Edit2: Typo in “Rune of Awe”: It reads “…base spell damageR for you…”