Hierophant Arcane Blessing feedback

I find myself still using the arcane surge support gem, it is just so much stronger especially if you take the effect of arcane surge nodes. Which makes me wonder if this node is even worth it? I do really like the elemental immunity but seems a little lacking.

Also consider you can put a lvl 1 arcane surge on any skill like flame dash to get the same effect. Maybe replacing it with or just adding effect of arcane surge might be more in line with how people use this node.