Kakashi is a good ninja

Until now I use him in battle.

He has two chases and can paralyze ninjas :)

i like to use kakashi in my combo team he good to make combos for me

With the fragments from 7th day? If you want to use him asap, go ahead. If you want to wait as you might draw him from Treasure you should wait. This will allow you to 4* him more quickly.

Kakashi isn't that good later in the game there are many ninjas who synergize better with the team.

He can be very strong in certain situations though, as your post lacks information I guess you want to use him for everything, if that is so there are better ninjas.

he has his pluses and minuses. but he is good until you can get someone to better fit the roles of hitting high and low floats, igniting and paralyzing.

He is really good in early game but in late game, he may has a lot of input but he is a glass cannon so replace him with sasuke

This. Though Sasuke isn't much stronger and just as often targeted. I say get them both 3*/4* and use them until you don't see them lasting more than 2 rounds. Find someone with more defense, speed or resistance to last until you have taken down an enemy.

If you're a lightning main, Kakashi is an excellent choice for your line up before you hit 50/55. After that, you might wanna switch to Sasuke 3 stars for better buff, also with the summoning pets you gonna get at level 55, chasing combo without Kakashi won't be a problem.

Sasuke has paralyses and he can ignite up to 2 targets or 3 if you're lucky.

Just wait for the 7th day frags.

kakashi is realy good for combo and i think he is a one of the most powerful for low level

I would definitely recommend him 15/10