I honestly wasn't expecting them to come out with this new sprite for Beelzebub, I thought it was a joke when people started talking about it in my crew. The battle itself is very similar to the raid one even if this one is not v2 and they switched the stack system to be connected to full chains. As long as you can burst the last 10% in one swoop it won't be too hard to complete.
Have you cleared this stage yet? What element did you use?