So here are the stats you should prioritize on(these can vary based on ninja)

Attack, Ninjutsu, Life, Resistance, Defense, Initiative(especially for pos 1), and Critical.

Stats that work but aren't worth investing in 8 gates unless there's ninjas with niche with that certain stat because it takes a lot more of that stat to overpower the opponent by using that stat:

Combo and Control.

The rest of the stats impact 0 to little value so they're not worth investing compared to the stats listed above. Even if tai/nin p3n3tration(highly unlikely) gave you like a tiny % more damage(highely unlikely people back in the day tested it all the time and it basically had no effect) you're a lot weaker(in real power not phantom power) compared to other players who prioritized in the 5 sacrificing that much defense, resistance, and life in defensive runes for some crappy barely boosting offensive runes.