Here is a little trick that I learned while in that region of wasted space in Null.
Set your drones on a target that is close to the ship being bumped. The Drone Target Ship will have to be in the same fleet as the Drone Carriers or the Drone Target Ship will have to have a duel initiated with it.
Use small drones so that the Drone Target Ship is not destroyed. Burn away from the Drone Target Ship out too 400 km, you will see that your drones are still aggressing the Drone Target Ship. Orbit the the Drone Target Ship at 400km and keep your drone carriers spread out, don’t bunch them up.
The Drone Target Ship should be fast in order to keep up with the ship being bumped as well as having a lot of tank to help keep it from being ganked itself.
The Drone Target Ship should stay at a range of 15 km from the ship being bumped orbiting it as well.
The smaller gun boats, frigates, destroyers and cruisers, protecting the Drone Target Ship should be ready to defend against the gankers using warp scramblers on their ships as such ships will be lightly tanked to reduce the cost of losing it.
Once the gank begins the drone carrier pilots issue the command to attack the gankers with their drones while the gun boats engage the gankers with their own ships.
The drone carriers will need to have excessive targeting range capabilities in order to issue the command to attack from long range.
Ten drone carrier Vexors + CONCORD should be enough fire power to derail the gankers attempt to gank.