One such trick could be when you are Single Sticking, with half flips. Try to hold both handsticks near each other and do each devilstick hit with both handsticks. This is very similar to the Dual Chops trick, however, you actually are catching and tossing the devilstick with both handsticks.
Another trick to try double handsticking on is the Stop & Go. There many tricks you can try this on which adds a little bit different flavor to the trick.