This just reeks of "Since I didnt think of it". Look, if you dont want to spend a bar, dont spend a bar, nothing changes. but in a situation for any combo starter you have, spending a bar on MB trance gives you the same if not more damage than ANY combo with MB rune, better wall carry, the ability to drain meter mid combo, etc. You were gonna burn two bars? oh look, you can do 47-50% from almost anywhere on the screen, pin the opponent and have armor
and before anyone asks why I ended my combo the way i did, you should look into it first