Coelogyne massangeana culture advice needed

[playtime8978]

I have just recieved a Coelogyne masssangeana and it it is not in the best way, the roots are dry and beige but when soaked they were firm just didnt green up, It is a 5 pseudobulb division. I have removed all the brown sheaths around the pseudobulbs and potted up into bark. I cant find much info on how to grow this guy such as temp, watering, light etc but I have read it can sulk for 2-3 years when divided and repotted the pseudobulbs are slightly shrivelled as it came from spain bare root with no moss around the roots to keep it moist, I am rather annoyed about it but the aim now is to get this guy well again, the leaves are nice and green though slightly wrinkled due to (I am guessing ) dehydration. What can I do for this plant to get him healthy again and get some new roots growing I think I am going to have to be very very patient for flowers but for now i just want him to survive. Thank you in advance.