User blog comment:Mich, Michele & Kuhla/Trial 008 Guide/@comment-27268294-20151125071922/@comment-27109417-20151125191405

Nope. Even with 18K HP, your chances will be 0%. I am doing the trial right now and when he used Galaxy, he dealt like 5000 to 7000 damage per hit, and this attack is a 13 hit combo (you can do the math). Not to mention, he removes buffs. So if you wish to survive the attack, your best bet is to be lucky and use a sphere, ES, or LS which can give angel idol buffs when HP is below 20%, and/or have the damage be mitigated to 1, just like Paris's LS.

However, there is a method I have in mind which may be able to survive Galaxy (only the Galaxy which is activated by using UBB, NOT the Galaxy when he turns into his 2nd form). I would try it but I want to beat the trial first before I do so. Perhaps you can be the test dummy. I was thinking that if you were to use Vargas's or Sefia's UBB, which can apply ATK reduction by 80% onto the opponent, that debuff can't be removed off of Lucius until the effect fades. Since the damage modifier is 1500%, the 80% ATK reduction will bring it down to 300% damage modifier. Perhaps if you do this and you have high amount of HP, you just might be able to survive Galaxy.

Of course, since Galaxy will also remove buffs and drain your bb gauge, this method won't be too useful in beating the trial. Perhaps it can be used as a killing blow with a chance of survivability if you fail. Still, it can still be pretty fun to try out to see if it's possible to survive Galaxy.