Stuff that boosts generic Transmutation spells?

[Amechra]

More specifically, I want to wring the largest benefit from Haste as I go into Swiftblade; however, the only feat I've found is Toughening Transmutation, which is really kinda eh.

Any other suggestions? This is theoretical, so all Dragon and Dungeon sources are open, as well as all official stuff.

I have seen Master Specialist, and it doesn't help.

[SorO_Lost]

Rainbow Falls (CM): 1/day triple duration for a transmutation spell for 2k, you've got to be kidding right?

+Extend = x4 duration.

Even 10/min spells at CL10 last 6 hours. Not much help for Haste but good for buffs...

Edit - You are aware of Swiftblade only wanting you to use your Spell Slots right? Minor Shapeshift is fair game, just as Wands are.

[Amechra]

Hmmm...

Would it be worth it to mitigate MM enough to just Persist it, using Rainbow Falls to make it last 3 days?

[SorO_Lost]

Haste isn't Persistable (not personal) and Minor Shapeshift is a Reserve feat that uses Swift Actions to refresh a multiround buff so I have no idea what you're talking about. But, if you have access to Persist already, awesome.

Speaking of MM, it requires 4th level spells not 3rd which does bring up another option. Swiftblade only wants 3rd level spell slots to be used to exclusively cast Haste, depending on your chosen progression you could be using 4th level slots to cast any 3rd level spell. idk if I'd want to delay Swiftblade an extra two levels through, just throwing it out for your consideration.