[3.5] How to get into Swiftblade as a Duskblade?

[Biffoniacus_Furiou]

You can pick up PA with a flaw, but not Arcane Strike, as it has a BAB requirement greater than +1. Unless your DM is letting you pick up flaws after character creation.

You can always use flaws to take other feats earlier, so you have your 9th level feat free to get Arcane Strike.