I do indeed approach the matter in the vid. I know these combos build meter, but I find it cool that combos regarding this damage scaling business are more than one dimensionnal.
But for some characters, Like Dr.Doom. Some combos actually give roughly the same meter and do that extra 100k.
Plus, x-factor actually turns this mindset arounds, since if I recall right, XF reduces damage scaling by 60%, which makes it 100% better to use these meter building combos on hit confirm (Unless you are running low on the clock and just want a quick end)