I use Ficus Benj in both my indoor cages. The plant is easy to care for(water once a week) and also grows well under your standard 5.0uvb bulb.
The only thing I have been told to watch out for is the sap. If you cut back the plant and it begins to ooze, there is a possibility it could end up in your poor chams eye

This can cause serious irritation and if your Cham is allergic, it can present a serious problem.
All in all I would recommend the ficus. My panther loves it. Just be careful with sap....