[isthisLOL?]

I think there's only 3 possibilities for the medley.

Old song + new song(probably progress or BRILLANTE as they are the 2 songs on the EP that would suffer musically from cutting them too short, progress is much more likely)

beloved(short version) + progress(possibly only the piano part?) + old song/BRILLANTE, but this would be around 10 mins even with cutting the songs because you CAN'T shorten progress without destroying it and the shortest you can make BRILLANTE is somewhere close to the 4 minute mark, or maybe 3 mins if you shorten the chanting parts
This would work very well musically though, the 3 songs basically lead into each other if in this order haha

or something involving the collabs and maybe beloved or Dream ON. They are very formular in their structure and lyrics and can easily be cut short. Even verse-chorus-chorus works for all of them. But I doubt this as she will perform at least one collab later and promoted them at a-nation already. Too hard to shedule performing together that often and she usually tries to show more than one song.

she won't sing only old songs in the week of the release so I don't think we should worry about that. So she will probably do the first option, with lots of luck the second if she gets a long timeslot.