I thought Leblanc was easy. You could kill her with out touching the flunkies (that are high on exctosy I might add).
ff1- Garland
ffII- Sergant
ffIII- Land Turtle
ffIV- D.Mist
ffV- Wing Raptor
ffVI- Whelk
ffVII- Guard Scorpion
ffVIII- Ifrit
ffIX- Baku
ffX- Sin Spawn
ffx-2- ???(Leblanc dressed as Yuna)