Ozymandias team comp

Depends on what you want. For crit, obviously the former. For more durability and NP spam, the latter. Also, the latter is better for harder content.

Ozy really shines through in a Buster Crit team which is the kind of team I personally use him in. Hans and Jack are therefore your best choice for making Ozy hit hard and show why he’s considered to be one of the best riders

Not any of them better, like mentioned above each of the team comps have different playstyle and for different situation.

You want a Short Fight with a strong Burst damage, Pick Ozy, Hans and Jack.
For Challenge and harder content Ozy, Mashu, and Waver is a solid choice.

There's a lot of team comps for Ozy like :
-Ozy, Leonidas and Shakespeare
-Ozy, Hans and Caesar
-Ozy, Waver and Hans
-Ozy, Leonidas and Waver
-Ozy, Jack and Leonidas
-Ozy, Mashu and Hans

And there are also lots of good CE for your team.
There's more of it, it's just for example no need to dead set on a fixed team comps and trust me there are tons of team comps for Ozy. Each of team set up works differently, especially when you need to use it based on your enemy or who you're fighting.