Your only option is going to be a castsequence because…
You’ll need to press it twice.
#showtooltip
/castsequence Aspect of the Cheetah, Prismatic Bauble
You can add a reset to switch back to Cheetah if you forget to press it a 2nd time.
#showtooltip
/castsequence reset=10 Aspect of the Cheetah, Prismatic Bauble