Shaman Apocalypse needing 100 glory to cast is just plain bad

Why does this skill need 100 glory when the whole vibe of druid is charges and rage. there are a whopping 2 nodes near druid for 30% increased glory generation and the lineage support gem that halves glory requirements is locked to banners. There are also ZERO support gems outside of the lineage to help with glory generation. This makes this skill such a complete waste of time and ascendancy points.

Tie it into rage or energy rather than yet ANOTHER builder spender mechanic built into druid.