Warning: I'm not all that familiar with this type of character, so I may have overlooked some rule issues.
That said, I suggest:
Rog4/Bard 1/Assassin 5/Sublime Chord 2 (CArc)/Arcane Trickster 8
Feats: Able Learner (RacDest)(Human), TWF (1), Weapon Finesse (3), Extra Music (CAdv) (6)...