You do know how slow mind transfer is right? heres a little treat for you from wikipedia ^^
This jutsu allows the user to send their mind into a target's body (even an animal's), supplanting the target's mind with their own. Though normally used as a spying jutsu, it can also be used in battle with several major drawbacks. First, the user's spirit travels slowly, making it easy to dodge. If the user misses their target, they are left helpless until their spirit returns to their body, which takes several minutes. Second, even if the technique does work, the user's ability to stay in an enemy's body is determined by how fatigued they are. The user can be forced out if facing a strong enough will (or two wills, in Sakura Haruno's case), are too tired, or if the target is in incredible pain. Finally, any damage the user suffers while possessing another is transferred to their original body. Therefore, if the target dies, so does the user.