Depends on the Setting. Idk, it’s not my job to figure it out. All I know is that the X-Men are working as a team.
Storm/Iceman have done combos before in: X-Force(1991) #16 and Uncanny X-Men #242. And in Uncanny X-Men #354 Storm/Iceman talked about using their powers together to fight Sauron. So, it’s actually not a new concept, but goes to show Teamwork. And yes add In Guggenheim X-Men Gold(2017) #28 that makes it in total 4 times times they used their powers together.
This is about Teamwork, two Omega mutants coming together using their powers as a team. This has nothing to do with Stormcaster.