My favourite is Zidane Cina Blank and Marcus... just kidding xD

Seriously though my favourite lineup is:

Zidane (cause he is strong can steal and is unchaingable)
Dagger/Garnet (Cause i like her eidolons better than eikos)
Vivi (cause he is da black mage BAWS)
Steiner (because he is a powerhouse and with Vivi he is even more powerful)

btw if you got Vivi and Steiner in the team and Vivi is in trance shouldnt Steiner be able to use dbl black?