Its not only the stats that matters in ET. Correct me if im wrong, only 1 team manages to clear the 20th floor out of many others who tried since at the very start of KTOS, among those who tried and failed are full STR swordie or full con pelt 3. So maybe the swordsman itself is the problem? Not just the stats itself. For me the great contender for ET on swordsman tree is hop3-dopple2. with hybrid dex - str ratio. My build is not for ET clearing but for GW and battle league. So comparing pvp focused build to ET clearing team is invalid. Full dex cata so far is good not just for lvl 200+ maps but for PVP too. Full str on the other failed so hard in questing at lvl 200 maps because theyre like paper from hard hitting physical attacks not just magics then they start rolling archer class because of failed STR build. Full Str in ET swordie is just a bubble from imagination of those people who build full STR for ET purposes.
Also this game would make it far into lvl 500, current full str build struggling at lvl 200+ is a bad sign for another high level maps, they dont have the capacity for survival. Thats why you see threads like swordsman is dead at lvl 200+ maps because those people goes full str or full con build.