I had a spiked tooth harrow like that one and I was very unimpressed with it, so much that I returned it for a refund. It was pretty flimsey, and was too light to accomplish much. It just bounced around.
Hard clods are hard to break up, and something heavy like a cultipacker works best. I have found anything you drag around just rearranges the clods, and may not break them up. On the other hand, breaking them up totally really isn't necessary, and some say having some clods remaining is good, as it prevents compaction and a hard baked surface. Last year it was so dry that after plowing, the clods were the size of concrete blocks and just as hard. It was a bear to break them up and it beat me to death driving the tractor over them. It took mutiple passes with a heavy disc harrow to chop them up, and then several cultipacker passes. Our timing was bad. Should have done this when it was wetter, but we did not have rain in late summer and early fall, so we had no choice.
What we do after plowing, and discing, is to drag a home-made drag made of heavy angle iron and chain. This levels out the high and low spots and gets things flat. At this time you could cultipack, to break up clods if they are bad, but isn't required. Then after broadcasting seed, we either use our same drag going fast or cultipack again. I will try to post a pic of our drag, but it is three 6' parallel lengths of 4x6" heavy angle spaced about 4' apart connected with a web of chains, with a chain tow harness on the front. Probably weighs 200 lbs and is indestructable. I have drug this thing 100 miles around our property. It also has the added benefit of dressing up the roads between each food plot. I made it out of scrap angle and about 60' of chain and eye bolts drilled thru the angle. Was easy and cheap to make. Another advantage is that someone can drag this with a truck and not tie up the tractor, and pulling it with an air conditioned truck is way more comfortable, and someone less skilled (like a teenager) can do this.