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As I said in another user's sheet, if an ability is considered a "low" end of a tier, just grade it down to the next tier. Meaning a "Low Tier (3)" is a (2) by any other name. This is becoming too specific at this point and suggests, not that I am accusing you of this, that the numbers are there to just ward off nay sayers. 

Until that change is made, I can not reasonably offer an approval. The distinction at the moment is that abilities should not be broken that far. It is suggested that the most simple route is taken. This also lowers the overall aggregate score as we would like; less high powered characters.