In August and September of 2023, a number of people went on fire kasina retreats together in Thailand for up to 6 weeks. Various people joined and left at various times.
This retreat had a healing component to it, with the idea being that people would get powered up on fire kasina and then have that enhance their ability to lend their healing modalities to each other. This worked out not only in theory but also in practice.
Rena on the healing on a fire kasina retreat
Rena on the retreat itself
Rena on advice for next time
Niffe posted a detailed written report here:
Fire Kasina 