I cleave on Dancer. The actual kill may be slower, but it requires very little support. Generally I build 300TP and 5 Finishing moves on a monster while I check chests with another account, and then I pull everything. Sekka -> Aeolian Edge -> Aeolian Edge -> Reverse Flourish -> Aeolian Edge -> Meditate +hits (OA2-4 offhand) -> Aeolian Edge kills everything and takes <30 seconds (unless the monsters are being dicks and running through my body). Checking chests is always the bad part.