I have had two issues, other then chromis, with my Lei. He did bite and leave marks on the Burrfish in my avatar. To be honest, I think it would have been just a temporary thing. I just added the trigger and he was trying to show dominance and the puffer just didn't understand and didn't back down. Had I did a properly intro'd him, and give it some time, I'm pretty sure it would have worked out.
The other has been with the Lunare that's in the vid. At times they've fought pretty hard. I previously had them in a 90gal fowlr and that was no way going to work. This time around I divided the tank with some egg crate, and let them get "used to each other" first. I have removed the egg crate (obviously) and they have been pretty good since. Still some issues when the Lunare is hungry, but the trigger himself has been good. That's to be excepted when you cram two 7" fish (the Lunare is probably over 8") into a QT.
The other fish in the QT, the Naso Tang, Whitetailed Pygmy angel, and damsel, he hasn't really even noticed.
To be honest, I'm not totally surprised the Humu isn't working. If you study the 'structure,' how the Lei and Picasso are built, they are very, very similar. Sufflamen triggers and Rhinecanthus triggers seem very closely related (just personal opinion, nothing scientific to back it up). Yea, I have read the same, that Sufflamen triggers are less aggressive then most triggers. In the world of Queen/BlueLine triggers, definitely, however they're definitely not the same as a Blue Jaw or Crosshatch. Some of the common trigger attributes still apply. I bet the angel, and depending on the type of wrasse, will probably work.
For the clown trigger, there are tons and tons of people with Clown's in commuinty fowlr settings. There just are too many stories of them growing up and becoming terrors and killing tankmates for me to try.
I paid $79 from a LFS. Lei's generally are from Hawaii, and thus if you're paying a good bit of change for one, they're from Hawaii. Their territory does extend into the general "Indo-Pacific" area, so a $40 Lei, is probably going to be from there. Another LFS had two $40 Lei's, but they were beat up. But yea, that was over the course of 3 years, and I still haven't seen one locally since. Definitely a rarer trigger.