At what sequence can she be played solo like Carthethya?

Im not interested in pulling for multiple characters, i want to know if her current situation in the beta makes her playable solo or at worst with 1 more character like hiyuki with chisa and i dont wanna read the silmarillion to know if she can

And please be realistic, when i say solo, i mean that she outperform her entire time just by playing by herself and dont need other characters buffs nor heals like carthethya s3, or at worse cases like hiyuki who needs chisa for healings and 1 stack of glacio chafe(which is just 5% but well, that's a bonus when getting healed)