Regular vagary hasn’t changed infact it’s still three to enter.
The “solo” option is only for people who need to unlock emp gear there are no treasure drops in the solo vagary option.
Alternative Route
In October 2018 an alternative means to unlock armor slots was added and is as follows:TLDR; this process requires you come just short of completing the Seekers storyline but the fights are scaled down allowing access to upgraded armor. New battlefields have been added to Vagary where players can face off directly against a boss enemy of their choosing.
The following battlefields have been added to Vagary:
Vagary: Putraxia / Vagary: Rancibus / Vagary: Pallitorus / Vagary: Perfidien / Vagary: Plouton
Requirements:
Putraxia / Rancibus / Pallitorus-
Must have completed the Seekers of Adoulin mission Watery Grave.
Must be in possession the “prototype sigil pearl” key item.
Perfidien Requirements-
Must have completed the Seekers of Adoulin mission Reckoning.
Must be in possession of the “prototype sigil pearl” key item.
Plouton Requirements-
Must have completed the Seekers of Adoulin mission Abomination.
Must be in possession of the “prototype sigil pearl” key item.
One to six players may take part in the battlefield.
All party members must fulfill the necessary requirements.
The “prototype sigil pearl” key item is consumed upon entering the arena. It must be re-obtained in order to fight again.
Joining the Fray
Obtain the “prototype sigil pearl” key item from the Odyssean Passage in Leafallia.
The key item may be obtained by trading the “befouled water” dropped by Fomor enemies encountered in Inner and Outer Ra’Kaznar.
Inspect the Ominous Postern in the Ra’Kaznar Turris and select the battlefield of your choice.
Dispatch your foes.
A time limit of 30 minutes (Earth time) is in place for the battle. After the battle, you will receive a title befitting your victory.
These battlefields will not grant experience points, capacity points, or treasure.
These battlefields will not count toward the Vagary objective for Records of Eminence.