The current situation of Nihility as Debuffer is sad and need to be studied.
Honestly been playing since D1 and I don't understand what is happening with Nihility.
When I started the game. I thought that
Dps/Buff/Debuff/Sustain would be the way to go and for a time it was. After all the only options for Harmony were Asta and Bronya, and Tingyun and we had Pela then Silver Wolf and Obviously Welt who was pretty broken at the time.
I remember how everyone was saying if you didn't get Welt or Bronya you should reroll (I got Yanqing and Bailu lol.)
Anyway fast forward and we went from Nihility+Harmony to Harmony+ Harmony.
Even in Kafka team Ideally you want a Harmony (RM/Robin). In Break team only choice was Harmony+Harmony.
Hell, even in Ratio team. You don't really want Nihility. Better get some low debuff from Aventurine and Topaz if you can or Moze.
Harmony in this game are so overtuned that whatever debuff Nihility have is basically worthless. Welt vanished and SW that everyone thought would be future proof vanished as well.
DoT kinda struggling even when they have their own DoT blessings in PF and this situation became worse with Sunday lol.
Outside of Archeron or Kafka team There is no situation where running Pela or SW or Welt will be better than running double Harmony.
This is just a random rant Honestly. Things will be interesting when Trailblazer eventually get Nihility Path. I wonder what will happen then.