it al depends on your midas' personality. i was able to keep a male con, 4 clown loaches, 2 plecos, a pictus and 4 bala sharks in a 180 with a 10.5" female midas. but when i removed all but the male con things changed. the other fish were able to take enough attention off of the con for the midas to live with it. i dont recomend a jag with a midas is that size tank. but you may be able to get away with a few smaller but tough cichlids like cons, jewels, or salvini's. as far as your featherfin only adding it alone may be a problem as the midas will focus on it as it will be the only other fish in the tank. i would add the catfish 4-5 tin foil barbs or bala's and some botias or loaches to spread the aggression out. hope this helps.