I am using a Schefflera Arboricola, Ficus Benjamina, and Golden Pothos all crammed into 16x16x30. Pip loves the Schefflera, likes the pothos, and uses the ficus as his pooping tree.
I've never seen him do it but there is always poop under the Ficus and nowhere else.
The Schefflera is the tallest and he uses it bask despite the lovely reptivines nearby I set up for that purpose.
The Pothos isn't fully grow in yet but he loved the huge pothos in his old enclosure. (Which is still sitting there empty with a pothos).
Pip is a senegal and literally can walk leaf to leaf he is so light and agile. I'm not really sure how any of these would work with a bigger cham but am not worrying about it as a senegal is about the biggest cham I want.