There is one sutta where a monk tries to recruit a deva to help him with his practice, and the deva replies rather indignantly:
I’m no dependent of yours,
nor am I your servant.
~ SN 9.14
So, yeah. I don’t recommend it.
Entering into relations of command and exchange with others is stressful enough even here in just the human realm, let alone across dimensions. You really don’t want to get involved in such intergalactic drama, even if it might look exciting and fun on TV.