Aeternal Circle is the next instance and 6 man.
Chaos Vortex is Lvl70 based, it could be an instance a moa-special or a world-battlefield (boss lvl 72/73 and lvl70 loot is NOT a lvl72 instance).
Qrich Cadaver Den as its currently called is the next *real* 12-man instance in the second zone of the Ch5 map.
http://rom.onlinewelten.com/news,id5150,…_locations.html
Chaos Vortex is not even connected (yet?) to the map at all.
So if you want lvl70 tosh weapons for mementos: never. because Tosh>Qrich , therefore Sardo(tosh) weapons and Aeternal Circle(Qrich) () = where the npc would be.
pro-tip: these npcs are totally useless. even those hybrid weapons from the tosh npc are better than the lvl67 sardo weapons. just use the brain not only the eyes (yeah you'd miss 1,5k patk on a tank sword ... who the hell cares if the weapon has 30% more DPS?)
The patchnotes translation would be:
Grafu hard 12 man => KT weapons available.
Sardo 6 man =>
no grafu weapons.
ToSH 12 man => Sardo weapons.
Aeternal Circle 6man =>
no ToSH Weapons.
Qrich Cadaver Den => Aeternal Circle weapons.
it says if whenever 12 man instances are released the npcs have the weapons from the
previous instance,
NOT the
previous 12man instance