What's the consensus then, is it better to combine or leave separate? I would think that it's better to combine since aren't their award charts the same?

I'm at about 700k miles on Asiana and 200k from Korean Air from back in the day. I guess I'm going to get much closer to a million miles. Miles have been slow going the last 10 years since you never get full miles for discount tickets and star alliance tickets. Lately most of my tickets from LAX to icn have been giving me the 75% miles, 4k or so, not the full 6k