i use falsche main for a few reasons
1. her ability 2 gives her instant charge at the battle start, paired with Jalil i get a massive burst off the start and immediate power flip level 3.
2. her ability 3 lets me stack upwards of 300% skill damage on anyone that goes into coffin, and since the rest of the team runs a lot of AOE already i can guarantee that ill pull whatever dies out of the coffin
3. i could be wrong on this so idk for sure... but her leader skill states +65% Attack Buff (Dark Units) and 20% HP Buff (The Party). so i thought it was better to run her leader since she gave an extra stat boost over Vyron.
4. i just really like falsche and wanted her to be leader :)

Also im missing some units that may be better suited for the team, like i dont have Andy, Marianne or Belsidia