Power is important but you need strategy , good ninja , cc,buff,skill,combo and mc talent.If you want to play aggressive Shikamaru(Chunin) is so good so 2 turn be all out attack and increase secret jutsu user defense and resistance by 100% not to mention he can breakthrough into skillbroken.So underrated is definitely Shikamaru (Chunin). Overrated who else if its not the annoying mystery skill cool down +2 user Udon.....JK its Kimimaro (Halloween)