Spell Totem charge requirement.

In a game where effectively generating charges during a boss fight is an absolute pain early on, why are we adding charge requirements to a meta gem? It would already be punishing enough to have to generate 1 charge for a totem, but 3? Reduce the damage the skill does, the cast speed, anything, but please get rid of this requirement. It makes no sense at all to have to go through the amount of effort that this puts you through just to make 1 totem.