I rate Gaia the Dragon Champion a 3. I rate it a three because if you get this card by itself then it is o.k. because it can beat the Dark Magician ,but not the Blue Eyes White Dragon. If you have to palmerize don't use it just to add a plus 300 points to your monsters. If your going to use palmerazation make it worthwhile. So if you have to palmerazize think 3 cards just fo a 300 point power boost. If you have just the card it would be o.k. to keep in your deck.
 

I rate Battle Ox a 4 because enen though you may think his attack power is low look again he is only at level four. Defenses might suck but who would even need them. I would put this card in my deck.
 

I rate Hane-Hane a 3.8 because even though its attack power sucks, it has the special ability to return a monster on the field to your hand. This means if you have a Man-Eater Bug you will be able to use his effect twice. Or if you have a Blue Eyes White Dragon vs. a stronger monster you can save it until you come up with a strategy to beat it and then play it again. I would put this in my deck.