On the 3.5 side, Spellthief Trickster is bard casting + 5/9ths of the Wiz list, still has the debuffs ; could couch it as "Stealing" a cutie mark which of course you'll give back when they get around to asking.
that VarMulti link is quite tasty looking. Off hand I'm thinking some of the more difficult PrC requirements, should be comparatively easy doing this ; like Sub Chord doesn't need a few levels of this and that, FochLyrist too.
If you can swing a Major Bloodline, you could basically build a full zoot 3.5 Bard and wtf a full zoot PF Bard does idk, and qualify early for a top shelf PrC ... yet still be hard pressed to catch a mostly Sorc based SubChord. Could tell your DM something silly yet slogan-y like : "if you aren't slinging 9s anything else is fine".