Brave Frontier - Grand Quest - Eneroth: Genesis - Avani's Team vs High Inquisitor Aranvis 1- Failed
So tried to seen how to fight Aranvis, and it seems that there are a couple of things you will have to watch out for.
Either you will have to OTK this boss, or you will need to be very careful if you try to fight him.
If you fight him normally, the very important thing to note, is that you must NOT kill the crystal/pylons infront of Aranvis or else he will buff wipe and nuke your team straight up, and it is not a one time attack. So angel idol's will not help if you aren't prepared (this was found later on with my team that had Selena).
Damage wise, the pylons do not do too much damage, but at the 75/50/25% hp marks i think, he will put up a 100% mitigation that can only be broken through dealing enough damage, similar to Paris' trial, and both Aranvis and the pylons will have BC drop debuff.
So one way to battle this is via normal hit count and sparks, and just focusing Aranvis down. Or utilize options of attempting to OTK a light opponent. -- Watch live at / isanwald