They would have been Division commanders, not battalion size. They didn’t get put out so palpatine could conquer . There would have been a sea of officers working up the rank that knew tactics on par or better than they could provide, the clones were made by the million, it was galaxy wide . Not one solar system like we know but many. Take a look up in your telescope. It would have taken hundreds of commanders to direct those clones, there weren’t that many Jedi. And lastly, the clones weren’t simple, they were images from Jango Fett who was far from simple. Lastly, they, the Jedi, couldn’t deflect blasts from that many droids. Basically there would have been more high ranking clones