Loki vs Imu is in a filler phase now, all we'll get are cling clangs and single panels until the plot is ready to move forward.
Which is fair enough, there's always a sequence to these things happening, e.g., Luffy's battle always comes after everyone else's battle has been resolved, and Loki's role is to occupy Imu until then so Luffy can return.
It's just a generally lazy way of writing battles. And One Piece choreography has been ass for a hot minute.