[@Vec]I'm glad you asked!  Your Chi is increased by performing a specific number of "events", the most common of which is defeating opponents who are of comporable or greater strength than yourself. Since your Chi is now two, it would take two opponents to increase your Chi.

Other events would include receiving training from someone stronger than you, making great discoveries, or havng a particularly powerful moment of character development.  It's a loose system.

Luck will increase as your Chi does.

You'll also be able to gain new techniques and improve upon your own, though I'm not entirely sure how to handle that yet.

So it's not a very heavy system mechanically, but I wanted to keep the stats basic to avoid driving people off who aren't used to this sort of thing.

And as for everything else there's always room for improvement, so new additions or changes can be made with group consensus.