An'ya Kuro vs Darth Nihl

who wins who dies?

Anya'Kuro her force power really outclass Nihl imo, plus she held her against Vader, Trained Krayt when he was a jedi, trained Aurra Sing. and is an overall badass chick

I think her force abilities can buy her time, and yes her performance against Vader indicates some skill. But she had a nexus and with her unboosted force abilities I'd reckon she'd just confound and annoy Nihl, until she tired herself out and eventually fall in lightsaber combat. If she had her small boost from plants or something I'd give her the win

Kuro.

Hm, this may depend on environment... An'ya is one of the very best Jedi at taking advantage of distractions and such.

And interestingly, she is Nihl's master's master.