I said those two because I know that they've worked together before. Tedder and Blanco worked on Why Try for My Everything (Ariana Grande), and Cashmere Cat and Blanco worked on Be My Baby.
Martin and Shellback worked on Problem, too, and Martin and Zedd worked on Break Free. So Ariana's album kinda provides a good idea of what their more recent works together would sound like, if that helps.