In my opinion he is one of the best great war version ninjas.
He works very well with the water class, because his area attack will cause stackable poison to all opponents when azure fang has poison tai as her passive.

he even has a well known team named after him, the poison kiba team,
that is fairly decent for mid/late game

if you are interested in that you can see more details here mid game team recommendations

or even if you are not the water class, he still works well as a tank as akamaru heals himself after launching standard attacks