I'll second this; I found Phenibut to be too inconsistent for me. Between trying to nail the timing for when I thought it would kick in, and dealing with the nausea that it gave me, it's one I ultimately decided to pass on.
Etizolam works exceptionally well in my experience; I don't use it very often though, or any other benzos for that matter, so I have very little tolerance towards it. As mentioned, half life is pretty short.
I've considered trying CBD for anxiety relief, but am a little leery at this point; I just get so tired of throwing money after natural remedies that promise you the world, only to be disappointed all the time.