By no means an expert in growing and cultivating. Family and friends would call me an expert in purchasing.
I live in Florida, midwest coast and grow all my Paphs and Phrags outside year round on a screened-in lanai greeenhouse/pagoda. I only move Orchids inside if Hurricane winds or less than 40°F. I have multiple fans on 24-7 in summer. I use rain or RO water. And an auto misting system if temp above 80 every 2-3 hrs to keep plants cooler. Fertilize weakly weekly. My media is 1/3 perlite, 1/3 charcoal, 1/3 bark. Water every few days, never letting Phrags dry out which sit in saucers, but water flushes thru the media. All slippers are pot bound even when repot yearly.
I purchased this plant two years ago in very good growth and this will be the second time it has flowered. Compared to my standard Charlesworthii which are single or double growths, starting off with this plant that was in excellent shape and grown in my Florida conditions, I believe has led to its second time flowering for me.