In terms of teamwork Asuma's team is the best, in terms of power Kakashi's team. Team Kurenai works also great together, only Kibe can be a hothead sometimes.
Personally I would place team Gai last. Neji is a great leader, but Lee is just...dumb, he always attackes every opponent without thinking and Ten Ten is...well...Ten Ten.
team kakashi cant be the most Successful team cuz sasuke leave it
team assuma also cant be assuma died
kurenai think once to breakups and leave her team
right