I am having some decent sucess so far this winter with my minis.
Ive got one Dwarf Cavendish, about 14 inches tall, a Double Mahoi, a Dwarf Ornico, and a few Little Prince and Truly Tinys.
They get misted like my citrus, usually twice per day, get a few hours sun and a bit of supplemental flourescent in evenings.
I almost lost my Mahoi as it was getting a lot of sun and it was a bit too dry. its since re-emerged with one leaf, and its a bit further from the window.
I did lose one of my tiny agri-starts right off, but im watering about once a week now and ill pot up the babies in the spring with some fresh compost and CHCs.
Good Luck!