Didnt i specify that even if Seju misses the direct hit the aftereffect will still hit? The AOE is huge and is a disaster for MF who will lose her movespeed when the slow hits.
And what pro´s are we talking about? I´ve seen Korean seju mains land precision ults past 2 frontliners ontop of a squishy and lead their teams to collapse on that.
But i digress, the entire scenario you describe is pointless.......because guesswork when we dont even know the specific teamcomps is pointless.
Guesswork based on empty scenarios like these simply dont work, for all we know the Cassio could predict Sona´s flash and ulti perfectly and kill her instantly or just cause her to miss the opportunity.
That or Seju engages on Sona and lets her team get ontop of her first before moving towards MF, she barely takes any damage from MF with standard builds anyhow.
-..-.........Alright i am also guilty of enjoying empty guesswork but its pointless so dont mind it, im still only plati for a reason.
But in my original comment all i did was point out that there is a massive difference in DPS between team comps like MF+TF+Sona VS Cassio+varus+ardent lulu will shredd tanks in less than 5 seconds almost regardless of which tank.
And speaking from experience, MF+company will not even be able to do anything for the first 7 seconds between in this case Seju passive+stoneplate, the sheer maxhealth and resistance´s will just negate any flat damage thrown at her.
I´ve been on all ends of all sides here, playing seju, against Seju and as MF/Varus/Cassio.
I have a rather good understanding of the difference in specializations between all those.