Hank Parsons, the cheese in the Eye-For-An-Eye tactic is NOT in Sanchu.

In fact... the very reason why I came up with this tactic was to COUNTER Sanchu.
When Kuriosan was spawned into the modding world, one of the most common complaint was his Acidic Backlash. Upon pondering the issue for a length of time, I formulated a theory in my head and presented it to the players to test it out.
It worked, brillantly. Too brillantly in fact.
All the player had to do was to start a chain reaction using a similar ability, and be immuned to the enemy's ability element.
You can implement this tactic using any of the following.
Fireshield Red/Blue
Hallowed Redeemer
Sanchuwhatjathinga
The battle is OVER the moment the enemy hits you, or you hit him/her/it. Assuming the enemy is not immuned to your ability element that is.
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Some may say this is the same as spell bouncing, but... not quite. There are similarities, but there are differences too.