Did Anyone Successfully Ooze Ngai?

I had what I thought was perfect setup for Ngai rp farming w/ ooze on v 25.

Run, War, Bst, Cor

3x Unda > Rayke
Tomahawk
Familiar
Ruinator > Leaden Salute > Purulent Ooze burst

However Ooze did damage but did not proc and despite going for unleash and spamming it, I couldn't get it to proc.

I know I saw people mention doing this sort of thing for Ongo or Mboze.

I'm curious if anyone was able to land Purulent ooze on Ngai ever?

Yeah, my group did but I think we had to wait for aura iirc.