You might be surprised the things one finds on Althanas... for example, if you make the first post in a battle, you could conceivably make an arena that bordered on a lake full of blood. There's also tournament situations such as the Gisela and the Cell in which lots of blood gets spilled. I was thinking a limit of more like 300 lbs. The main reason I can't allow Ketsu to grow so massive is that having the strength to even move while so heavy would by definition give them extreme strength. You'll be able to increase the size they can grow as you level up, but it may take you awhile to get to 10,000 lbs.

And lastly I'm going to have to ask you to lock Substitution technique for now. Malleable form is still so powerful on its own that it will fill up your permitted Total Power Level.