I'd love to are her work with avicii and Calvin Harris. Seeing as she worked with madeon and zedd and they made flawless tracks she would work with more EDM DJs
I'd like to see her work with Dev (Blood Orange). I love the stuff he did with Solange and Skye, plus he's not too overused (yet). Last I checked he follows her on twitter too, so she needs to get on that.
I'd also be interested in seeing her work with Butch Vig, Trent Reznor, and Dance with the Dead if she plans on going with a dark electronic vibe.
If she's going to stick with dance pop I'd like to see her work with Stuart Price. His work on Kylie's Aphrodite was perfect.
Otherwise I can't really name many others atm. I'd like to see her reunite with Garibay and Space Cowboy just to see what they'd come up with again.