For most cases for boss battles you dont want to open with high jump. You either run up or land a well timed elusive jump. But mostly running up and hitting true thrust should be your first opening move most of the time.

Also the single target rotation goes as:
Chaotic spring combo-
True thrust/raiden thrust > disembowel > chaotic spring> wheeling thrust > fang & claw.

Heavenly thrust combo-
Raiden thrust (if you started from chaotic spring combo)> vorpal thrust> heavenly thrust> fang & claw> wheeling thrust.

So it looks like
Chaotic spring combo > Heavenly thrust combo> rinse and repeat from the beginning.

AoE combo is correct.