I'd just like to know if the Tai/nin p e n e t r a t i o n stats are of any use, I have a level 7 Red Scorch chakra (TAI p e n e t r a t i o n +897) on my pos 1 and I'm not sure if it's actually increasing damage or not, I wouldn't want to let a possibility to increase my damage output go to waste, so Is it a chakra worth keeping, or should I replace it? Also is there a specific chakra layout for 8 gates? I know that nin and attack and health are important, but are there certain chakra's I should be using for each character?