Possession and spirit bolt/blast, How do they interact? Options

[Edward]

Possession and spirit bolt/blast.
How do they interact?

In the current adventure we are facing an early breakthrough of shedim, we don’t know a lot about them but we know they are a spirit that possesses a body, and that with the spirit gone the body is not a great threat, our tactic in the last encounter was to force the spirit from its body (ether threw banishing or beating the regeneration it grants the body) and then banishing the spirit itself, this means we have to kill each spirit 2wice and it has a chance to claim another body or run. Having only one member of the team (myself) capable of interacting with the astral (seeing the spirits and banishing them) this is a time consuming and dangerous tactic

Looking for a way to tack the spirit directly I cam acres the spirit blast spell, with this spell I could directly kill the spirit if it will affect a spirit that is possessing a body. But will it work and why.

If the answer is different for shedim and other forms of possessing spirits (notably loas as it will be hoguns I ask for information on spirit blast and position)then I would need to know that as my in character decision on whether to try it will be made without specific knowledge of shedim.

Edward