Smoke Mine, Eldricht Battery and Mana Reservation

Smoke Mine incorrectly still requires MANA to cast while having Eldricht Battery.
Expected Bahavior: Having allocated Eldricht Battery should allow ALL skills including Smoke Mine to be cast as long as Energy Shield or Mana is available (unless casting with Life that is). Reserving all Mana still should allow casting all skills including Smoke Mine as long as Energy Shield is available, but in current state, Smoke Mine cannot be cast.

Bug Reference Number 3.071.701.578.

Ah, ok, I see the reason is that Smoke Mine still requires some Mana to be reserved. This is explaining the behavior, yet having Mines reserving Mana is pretty unintuitive.....