I don't know the temperment of asian aros, so I can only comment on my Black aro and discus tank. First thing is you need to have adult discus that are hardy eaters, juvinilles can get stressed during feedings which causes problems. The temp needs to be 82F/27.8C degrees minimum, I recall in another post your tank can get down to 77F/25C degrees. You water needs to be changed on a weekly basis to keep nitrates near 10 ppm, discus do need pristine water conditions and I'm sure the aros will only benefit also.
I would suggest becoming experienced in keeping discus, before atempting the mix. Also I would avoid any live feeders for the aros, if housed with discus. Discus are a little more susceptible to diseases.
You can see my black aro/discus tank by clicking the link in my sig.