what is an ideal cymbidium potting media?

[ajdamania2]

Hi all,
I bought 2 big cymbidiums about weeks ago and i thought repotting would be a good idea.unlike other orchids i have , i used plenty of orchid compost with some bark. but potting media almost never get dry(looked stale) if even after my 10 day holiday. got some yellow leaves.today, removed some of the compost and added some bark and perlite.still looks more like soil rather than course bark.draining the water takes about 30 mins.what is the best potting media.

Many thanks