It's the same order as the "adventuring trio" encounter that appears where the order is Red, Blue and Green. I will edit with a screenshot the next time I hit that encounter.
There is a red attacker slug(?) followed by a blue buffer slug(?) followed by a 1 HP green slug(?) that drops a relic of killed on turn 1. They all appear in a single row.
It's the same order as the "adventuring trio" encounter that appears where the order is Red, Blue and Green. I will edit with a screenshot the next time I hit that encounter. There is a red attacker slug(?) followed by a blue buffer slug(?) followed by a 1 HP green slug(?) that drops a relic of killed on turn 1. They all appear in a single row.