Humid air does not mean saturated compost. Keep the plants in individually draining pots with normal ventilation and check every medium separately. Provide bright filtered light and enough space to inspect the bases of the plants, especially where several crowns meet.
The message behind the grouping
Meaning, with a little thought.
The contrasting textures and restrained color can express renewal and variety. The display remains a collection of living plants with different root habits, not one shared watering system.