Here is an excellent yet simple way to progress the Anti-Rotation Press by adding some perturbations. 

The erratic/less predictable movement of the perturbations challenge both the larger core musculature but also the smaller stabilizers that are important for health and performance, all while adding a slight shoulder stability component. 

We typically perform 2-3 sets of 4-6 reps on each side, holding the arms extended position until the movement of the band comes close to stopping.