ultimate bosses are the endgame bosses for ffxiv, but those are strictly locked behind parties and statics. Having content such as criterion dungeons are kind of the start to true solo content wrt to patch and ilvl, so when do we get savage solo bosses and ultimate fights that we can solo?

ps: im not talking about unsynched or soloing past content, i mean actual solo bosses or ex trials that are doable with synched ilvl, with any class.