Outro Hints needed

Any suggestions on how to do a nice outro.At the moment I usually just take the pattern before outro and modify that with say a roll and simultaneous kick crash on first beat of second bar.However I would like to try an outro that slows (ritardando) boom …cha …boom…cha…boom.
Any other idea would be welcome as well thanks.

I’ve got one or two that do this, but, sadly, it’s very much a try - playback - repeat process to get it right.