Sorry, I just saw this.
In bark almost every Coelogyne will need watering every day. They are wet growing plants. The cautions against overwatering are really cautions against growing them in decomposing media that compress and have no air spaces. They all need heavy watering. Your plant has wrinkled pseudobulbs because it isn't getting enough water. Your 70% humidity is great for them.
Your plant got sunburned and/or overheated. It will probably recover.
Unfortunately you chose a hybrid of two cool to intermediate growing species. That refers to night temperatures; they can get quite a bit warmer during the day if nights cool down nicely. I know it's hard, but try not do do that until you have a refrigerated greenhouse. There are some warm-growing species and hybrids.
Do some browsing here,
Coelogynes.com and look up the ancestors on the
Internet Orchid Species Photo Encyclopedia.
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