Hello and welcome.
Most paphs would be good there as well as phals (I have a couple of micro-mini phals in my orchidarium, one is phal lobbii (lobbii forma Naple x lobbii forma Vietname) and the other is Phal. (Caribbean Sunset x finleyi)). Dens want much more light than either phals or paphs. so I would not put them together. Though if the dens created shade for the lower light orchids, they might work together.
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