Resilliance already answered your question. Tendo does a lot of damage for the entire team because of his AOE mystery. However, if you plan on using on your regular main team, you might see unfavourable results because he lacks defense. Like what Resilliance said already, the only time you'll see a tendo team is in GNW, ranked battle or in a team of 3. People tend to use him with lightning main because of standard attack "calm mind" which allows him to get 20 chakra points. Also, it requires 80 chakra points to launch him. That being said, you have to make a lineup only around him to be effective.

However, if you don't care about it and just want to have a team with tendo and jonin minato then try this:

Skills: 4,3,2,2,1 Summon: Shark

If you want to experiment teams, use this simulator from the german server: http://naruto.rednubes.de/# Use this simulator until you are happy with your team.

Forgot to mention that there are translations for the ninjas and their skills: https://docs.google.com/do*ent/d/1vtTQck-DtuaRm6smqFhJ8ZjLqO7Mvd6Kr0QlNKXusRg/edit

I figured you would be able to figure how to use the simulator but no... So first, you use translator on your internet browser. See that blue down *on on the webpage? Click that and click the choices to change the character mains. Beside that is the talents of the mains and beside that is the summons. Just drag the ninjas you want on your team on to the 3x3 grid. Is this easy to follow? It's better for you to learn how to make up teams than asking for help since sometimes you get lineups you aren't happy with but if you make lineups for yourself and understand what is needed for a lineup then you'll be happy.

I figured you were new to the game when you only care about a high combo. Yes there are other factors that make a strong team besides a high combo. Depending on the team, on average, the combo is 5-9. Being able to control your opponents team via chaos, ignition, poison, acupuncture, immobile and all the other status from skills allows you to limit the movement of your opponent., so yes. But some players will have a team called a "blitz team" that focuses on dealing high damage with buffs from ninja skills so they can finish asap.

You'll most likely stop using itachi when you hit level 70 as you gain access to the kage treasure and you'll most likely change your team. A little advice, go on youtube and watch gameplay so you'll understand the different types of teams out there.