BGreen

Alocasia robusta are a difficult plants from what I have read.
I have not tried them. I have a few alocasia 'borneo giant' pups that I have in an old aquarium too. The higher humidity helps keep the spider mites off them and gives them a little more warmth than the rest of the basement. You just need a good light. I used to keep dartfrogs and had multiple terrariums and like using Compact Fluorescent strip lighting to help keep the plants from getting 'leggy'. Air movement is helpful, but I haven't had a real problem with opening the lid once a day. I am working on my computer fan system to give the tank much better air movement, and in the past I used a cool mist humidifier to produce a fog that kept the humidity levels very high.

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Take care,

BGreen