Holy cow that's a lot of damage.

TTYD in Small Numbers:    • TTYD in Small Numbers  
TTYD in Bigger Numbers (Rawk Hawk):    • TTYD in Big Numbers II: Rawk Hawk Edi...  
TTYD in Even Bigger Numbers (Arantulas):    • TTYD in Big Numbers III: Arantulas!  

Shadow Sirens (Beldam, Marilyn, Doopliss) with 30x Enemy HP and Infinite BP.