From my experience, you should build a knight team (you can mix it, but make sure you have bullet sponges) for the continent of sins, the 4th v2 tavern. I didn't have Lilith back then, so maybe Lilith+soldiers would work (my knights did die with Arietta though).
For the 3th tavern's zone (I'm going with taverns since seabreeze is in yggdra and is the first v2 tavern), either soldiers or mages is fine, but knights have a hard time.
Also, you will need a competent archer team to access othis one important quest (prizes feature one op spear for Wayne among other pretty nice shines) in the sin's casino. Don't fret, though, since good archers are featured in the 2nd and 4th v2 taverns exclusively - soul forest's are way outraged by then.
Lastly, mage-only and warrior-mage teams are important, but not as much.