Here is a fun partner core / stability drill. Partner Pallof Press
I forgot what an awesome accessory exercise Side Dumbbell Bends are. Did 3×20 each side with a 40kg DB yesterday and boy are my obliques sore today … What are your favorite accessory exercises?
Tucked L-Sit to L-sit, to the bottom portion of a manna and reverse.
Need a new challange for your core? Here is a variation that makes battling ropes 10 times harder.
Jen Comas Keck shows a nice core / abs exercise – band resisted jackknifes. If banded Jackknifes are too hard for your current level, you could lie on your back an do band pull ins like in video below.
I did and liked it. Really nice exercise engaging the whole core. Advanced Bodyweight Training Exercise: Rope Plank Walk: