Hello everyone! 
I’m here because I have a HUGE question, but I’m going to explain the details first:
I made a new alliance with my friends.
We’re 12 members with +3000 of team power.
We’ve been hitting 2* titans and because of that we made a unique rule: everyone will hit the titan just once so we all can defeat titans and get the titan chest
The fact is: 2 stars titans are too weak for us to hit them multiple times.
Today, one of us said: “what if that’s why we keep having 2* titans? We don’t kill him fast enough to get a tougher one”.
So my question is:
Is he right? 
We need to kill the titan faster in order to get a stronger titan?
PS: sorry for my english.