Ninja Gaiden Sigma - wooden sword question

So you can buy the wooden sword for 500 money, which is cheap, but it has about 7 or 8 different levels whereas all the other weapons only have about 3, and to get to each level is outrageously expensive.

Is there any point to the wooden sword? Is it good if you max it out or is the whole thing a big joke? Because it doesn't seem to be that good of a weapon at all.

I don't get it.

all the levels are useless until you get to the last one, which becomes something perhaps even better than the other big sword(can't remember the name) and the dark dragon.

the last level is unlaboured flawlessness ( check youtube) it's awesome.

I disagree with the above posts. The weapon is overrated. It's too slow. Against fast enemies you leave yourself too open. It's really only good againt slow enemies were you can charge up your ultimate attack.

Its has similar attack power as the 3rd level dabilahro but is somewhat faster andhas some combos similar to the dragon sword.

What I did was after getting the flail and grail. You know in chapter 7 where you first fight those big slow monsters that swing slow and long or jump on you? The part where the blue orbs attack you, right before you get on the sort of elevator where you have to hit the button to use. I think it's called the cave of Eons or something. I run back and forth until the orbs are out of view and then go back because they constantly respawn and I use the flail, power all the way up with Triangle and kill them and repeat this process over and over to get big yellow orbs. I get about 3,000 each time. I was able to fill up on all elixir's upgrade whatever weapons I could. Could only get the wooden sword to level 5 (20,000) before they stopped offering upgrades but it clearly has at least 3 more levels. Also bought the max amount of those revitalizing talismans (which is 3). Still have 21,000 left and will finish doing this later today again to get as much yellow orbs as I can before moving on. I want to have enough to upgrade the wooden sword and the dragon sword when it's made available for me to do so. Or anything else that might come in my path for me to buy. Just extended my life bar as well with 9 life of the gods and 3 of those thousands lives.