I decided to plant various gags on various toons because I like variety
I intend to try all the gag tracks - yes, even toon up (there is literally a story behind that).
I've never dug them up to plant another gag with the exception of Robin - she originally had trap planted but I decided to plant throw and have Morrigan plant trap instead.
The only one that planted a gag track according to what the toon was doing was JL Energy - I planted lure since she was orignally a sell uber and I thought it would help.