If you ever meet a warrior who like using spell reflect your grounding totem are lovely, it will protect you from yourself.
I have experienced this so I know it works.
The tooltip says:
"Summons a Grounding Totem with 5 health at the feet of the caster that will redirect
ONE harmful spell cast on a nearby party member to itself, destroying the totem."
You cast a spell, the enemy reflect the spell and it will go for the totem.
But I think it counts as your spell and therefore it will not kill the totem (you can't harm your friends).
You will see your "dmg-text" above the totem as if you shoot at it but it takes no dmg
So the totem stays on the ground until its destroyed some other way.
You can pewpew spells and reflect every single one of them without taking any dmg as long as you have your grounding totem :]