pf arcane duelist bard build advice

[Strormer]

I'm hoping to get some build advice. I am building a Varoot Nerra (fiend folio) Arcane Duelist bard for a 3.P planehopping game. I want to be a buff/debuffer with some melee and I've got a pretty nice longsword starting out. Level 12 and plenty of gold. I'm mostly looking for good ways to hamper enemies. 3.5 materials are allowed, but PF is preferred.
Thanks in advance.

[deuxhero]

Personally I feel if you work to add 3.5 spells to the spell list, Magus is a better Arcane Duelist than Arcane Duelist.

That aside, if you can, going into Sublime Chord is nice past level 6.