For the most part she has "less" mechanics and it's a lot more friendlier if you die, but you're still under a tight DPS check. So if you've skipped Nidhogg Ex, Sophia Ex is probably a better option aside the obvious rewards, since it's a lot more of dance similar to Ravana (when you do it you'll see what I mean) compared to even Seph Ex.
It's a fairly easy fight like yoshida said it would be, but you have to really pay attention to the battlefield, people seem to miss the very obvious mechanic even in normal mode of the scales. (tether amount dictates the direction you'll tilt, easiest way to explain.)