WOW, so you have actually bred them? That's insane, and that oothecae incubation is SO long! You said cannibalist, do you mean are they cannibalistic towards each other? I really hope to see these bred in the hobby more often soon, would be amazing if they made it to the US!
For nymphs and adults bark should be fine. I don't think these require rotting wood, although if your enclosure was large enough, a big rotten branch/log would make a nice piece of decor.
I think to start the nymphs off, a 20qt bin would be fine, with multiple feeding stations so they can easily find food. But as they start getting large I'd move them to something twice as large to get the biggest adults possible. With lots of vertical bark for them to molt from.
For some species I use a plastic milk/juice cap as a food bowl and put food in there, but for more picky species that don't like using bowls, I just place food straight on their substrate or hides, in corners of the enclosure or high traffic areas.
For vegetables I'd use lettuce, carrots, and maybe sweet potato.
Probably not, they are a nocturnal species after all, but exposure to indirect daylight during the day would also be fine.
You probably won't be able to notice this until they are larger, but the last ventral segments on their abdomens will be much smaller on males than on females. Similar to how you sex Blaberids.
