Good post. 

I have my response in mind, so expect a reply here before Spirits. I was thinking that Kurama was going to attempt to capture one and get it to talk, but it detonates similar to how Karasu manifested things and made them explode remotely. Obviously Karasu is dead, but just the fact an imp can explode without Kurama even being able to sense who detonated the blast speaks volumes for who they're dealing with. 

Was going to let Botan's Spirit Gun stun one of the imps that melded away. Did you want her to fail and have Kurama take a scratch as a result? He's going to be between her and those imps at all times.