Grandia - Boss #1 : Rock Bird (Low Level, No Damage Taken)

Grandia has always had a reputation as a game with an innovative combat system but lacked challenging bosses to take full advantage of the combat system. This is coming from a casual player and gaming journalist who is known to be a not-so-good player.
With that premise i thought that this will be interesting Challenge.
As always, rule of the challenge:
Low Level - No random battle exp taken and all yadah yadah
No Damage Taken - This is interesting while the later series acknowledge it. The early one doesn't. Still interesting challenge to do tho.
The rest of mechanics is fair game
==Boss Section==
While this boss isn't challenging even with Low Level gimmick but combine this without taking any damage make this boss 10x harder than usual. This is because the lack of damage we can give make the boss have more chance to deal damage.
The solution is actually to making note what skill, combo and critial and all of its combination is best suit for all scenario.
For example. the bar from wait to com have 3 bar. thus we need to know what to do when picking action. Most of the video shown that if the bar is in com and Rock bird is charging for skill fire bird then it save to use Justin Cancel. etc, etc ( i don't want to write all of combination, you will figure out after resetting more than 30x battle)
The challenging part is actually when Rock Bird decide to use attack. In early Grandia. We cannot know who will be attacked. Thus making this battle more RNG than should be.
And depend on where is Justin and Sue bar located. Most of the time if Rock Bird targetting Justin he cannot do anything thus guarantee reset. If Sue is targetted we can always cancel on time but its still RNG based and in this attempt i got lucky that Sue actually can use evade to basically rolling dice for chance of evade.
Fun battke if you ask me .