I wouldn't worry about this one. Cheapest slime is only 5 shards.
Edited by Ahmad_Hussein(181183890) at 9-18-2014 10:31 AM
"35: The Atlanticore's skill "Spectacular Scales" reflects damage through Guardian Angel. The talents Blade Shell and Flame guard do as well."
I've tested Atlanticore's skill and it does not take effect during Guardian Angel.
Edit: Unless you listed that as a common mistake itself, excuse this post :p
Edit again: Does this mean that if you drop a guardian angel on a hero and your hero is attacking an Atlanticore, the Atlanticore can reflect damage through the guardian angel?