Use only one character to fight boss, you have 3 formation you can easily change, make one formation for fighting normally and one for fighting boss. Put one character in the fight boss formation. I use Yeonhee because she is range and hits boss before they attack.
Mod crashes game when trying to use in PVP
Mod crashes game when trying to use in Infinite Tower
Mod crashes game when trying to use in Chaos Ruins
Mod crashes game when trying to use in Boss Rush
mod crashes game when trying to use in Challenger Pass
Mod is good in dungeons, and for farming...