let streamers know the person they want to raid has already initiated a raid
once a raid is initiated by the streamer any streamers planning to raid in should be given a notification that the current stream they want to raid into is in the process of raiding another streamer.
this would help with instances of when someone raids into a stream that has already raided out leaving them in an empty chat.
possible solution: having a notification pop-up letting Streamer B know that Streamer A is currently in the process of raiding another person. accompanied with a button allowing Streamer B to "cancel raid" or "join the raid", which would let them group up their viewers and the viewers already in cue to raid, would be very cool!
another case: Streamer B raids Streamer A as Streamer A raids Streamer C. we could just have Streamer B's viewers jump to Streamer C.

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iandouglas736 commented
Love this idea
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Matty_TwoShoes commented
Common occurrence, especially given the number of channels live on Twitch so this is likely to increase over time too. Easy enough to address!