The Room of Spirit and Time

[Kaden]

Sure, you get to have well-rounded stats with one being pretty high, but take a look at the abilities list and see what you're missing!

Totally depends on the character concept. If all you need for your character is, say, Water Ki then taking Inner Strength is better than shoehorning something else in just to have it, in my opinion.

Yeah, there's a trade off. It's basically a CA bonus, but you don't really get to make Custom Moves with it.