User blog:J9101/Karna mast squad building help

I know this is asked alot but im doing it anyway

I need help making a squad to hopefuly kill karna masta so my units are

Omni: vargas eze  juno-seto  lauda  serge  zekt  lara  izuna  lyonesse  daze  shura  holia and gabriela

7 star: grahdens lugina  owen  paris  seria  melord  kalon  silas  lucia  ark        gazia I could also get 7* tilith if need be.

Thank you for your help.