wire is too skinny, they need different sized things to grab onto
i use 8 small exoterra bio vines twisted upon its self in a double helix fashion giving them different sized areas to grab on the same vine. i have a 2x2x5 (LxWxH) with a corn tree/ ficus/ phoenix palm. also i put in fake vines around the sides i purchased them from hobby lobby for 3$ a piece, and they have held up better than the exoterra plants. they are silk. so depending on the way you ficus looks, and what else you have in there will depend on this. My goal was to stock it full to replicate the wild, and the bigger reason so they wouldnt ever walk on the screen. (they sleep on the screen though) So i managed to achieve my goals on that