A descending ladder of bicycle crunches and cross body mountain climbers. Both moves challenge your abs in different ways (time under tension and dynamic ab work) for another superset style ladder
Push-up Ladder (bodyweight strength) - a descending ladder of push-ups and forearm planks. Sounds simple but remember - you are still contracting many of the same muscles when you plank as you use when performing push-ups so this takes on bit of a superset style ladder.
A descending ladder of squats, push-ups, sit-ups and bridges hitting all the major muscle groups leaving you FULLY STOKED from head to toe.
A descending ladder of sit-ups and mountain climbers. Both moves challenge your abs in different ways: sit-ups in a time under tension manner, mountain climbers as dynamic ab work so again, a superset style ladder.