Help me revive some plants? Dedrobium noid and Maxillaria spegazziniana

[Pawbla]

I have two plants in very bad shape.

One is a Dendrobium (Phalaenopsis type). It was bitten and dragged across the garden by 4 puppies. It wasn't in excellent shape to begin with, and obviously now it's lacking leaves and a proper root system.

The other one is a Maxillaria spegazziniana. Nothing bad had happened to it until I left it in the care of someone else (with the Dendro) for 3 weeks. It's not in a very good shape now, several leaves and pseudobulbs have dried up. It has some new growths though.

The Dendro has been potted in the same mix for around 6 months now (Bark/charcoal/sphagnum/perlite, plastic opaque pot). The Maxillaria is mounted on bark.

They are both inside now and under lights, because it's under 0 degrees Celcius outside at night. It's winter and the climate is humid.

Can someone provide some intensive care plans for them? As in: any sort of products I should use on them, should I water normally or change the watering schedule, should I repot/change potting mix, should I add sphagnum to the Maxillaria, etc.

Thanks a lot!