Ticket Keeper must've wanted to smack Lucifer by the end of the movie

During Alleluia

Ticket Keeper: We need a serious plan of attack for our war with Heaven.

Bayonette 1: I have a plan... Invite God down for a meeting, knowing that He won't come down himself and instead just send his leading officers. Invite them to a tea party and poison them, leaving God without defenses

Bayonette 2: No! Here's MY plan... Just storm the gates of Heaven without any warning.

Bayonette 3: No, no, no. This is what we do... Send The Twin up disguised as The Agent for a sneak attack.

Ticket keeper: These are the dumbest plans I've ever heard.

----

Lucifer: Can I tell you about my plan?

Ticket Keeper: (About time!) I thought you'd never ask.

(After Alleluia)

Lucifer: Basically I've already begun the war by doing what Bayonettes 1 & 3 have suggested.

Ticket Keeper: (facepalm) ...We're all going to die.

----

Thanks mrwiiboy for reminding me of the Bayonettes' plans (all of the spoiler tags are written in his words).