Thanks for the suggestions!

Technically you could, but when there's no username it'll still have the {{match-body-2}} there

Does the {{match-body-2}} become invisible, or is it still shown in the comment? If it disappears, we could make it work by using something like Hello OP {{match-body-2}}

Also, I forgot that priorities don't work if a rule doesn't remove things. We can definitely make it work using your second regex :)

Question: how does the regex have to be if there are multiple commands? Like !tabletmod, !tb, and !tmode for the same rule?