Quote Originally Posted by Alhanelem View Post
I think it's just poorly worded. There is no variance in the rate as long as your TH+ total is higher than the current TH level on the target. That's what they mean when they say adding more won't increase the rate.

If you don't have the maximum possible TH value, the rate of increase will be the same from zero up to the highest level you have, and then it will decrease. It doesn't matter if you have TH+3 or TH+5, until the TH value reaches those numbers.
I still don't understand. As soon as you touch the enemy with whatever TH+ you have equipped, that's the TH level that's on the target until it upgrades. There's no way to be attacking with TH+5 while an enemy has anything less than TH+5 on it.