Hi! I'm Sharisu from S26. :) I'm a lvl 69 Azure Fang and never changed class every since I first played this game. XD

Since Narbsy already answered your first question, I guess I'll be doing the second one about a lineup.
My fave lineup and the one I always use consists of 2* GNW Kiba, 3* Hinata and 4* Kakashi.

The lineup:
Main -- Kakashi -- Hinata
x -- GNW Kiba -- Akamaru
x -- x -- x

Talents: Heal for both active and passive then chakra dissection blade, neutoxin and poison tai.

Summon: Bull

They only have at most 6 or 7 combos but they're really strong. I can defeat people who has as much as 5k more power than me and has a higher level. :)

Hope my lineup will help!