User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20150531181530/@comment-26509851-20150531185727

@Fondrive

What would be the meaning of defensive ? Watch gaijin's analysis

I would even agree with his speculation:

One for timing and charging powerful attacks.

One for mobility and jumping.

One for using spirit gauges and phials to your advantage.

And one for helping yourself or teammates.