My ranking of the Arrowverse crossovers
Actually incorporated the shows in a way that worked
Felicity and Iris working together
They vaporized a priest and nobody cared
Olicity stealing their thunder
Alternate Oliver and Kara together
Using the Waverider for time travel
Sara saying that Kara is hot and agreeing that the president is hot
Mick calling Kara "skirt"
"You know I prefer girls"
"You're lucky I'm not a trained assassin or anything"
"See you later dominator"
A lot of talking and human stuff
Firestorm using their powers
Laurel, the goodbye made me cry
No nerds from Supergirl are in the crossover
The Supergirl part is not called Invasion
3. Legends of to meow-meow
Human Gideon in leather (hot damn, Amy Pemberton)
John x Desmond kiss saving the timeline
"So you think I'm hot then"
Referencing the crossover
none I just didn't want to put it higher because it isn't an official crossover
4. Crisis on infinite Earths
Caity getting cropped out of the promo pics
Lex Luthor being completely unnecessary