Synchronization

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Now I am developing 2d ball game. Each ball has rigidbody2D and circleCollider2D. And the main problem is Synchronization. I've tried to use free TrueSync package, but making AI is difficult. I've also used PhotonRigidbody2DView and PhotonTransformView. But it doesn't works smoothly. Could you help me? Please tell me what can I do? What do you think about loadbalancing? Can I solve this problem with Photon Cloud? Or May I use my own server?