The tungsten carbide nozzle that I use is pretty good. I have only ever had one clog and I was using old filament. I just heated the head to ABS levels and it drained the clog simple enough. When I have had clogs with brass nozzles it can be a chore to clear it. Sometimes requiring taking the whole thing apart. So the tungsten does it all from what I can tell. I havn’t changed it in over a year and my prints come out looking great. The quality of the filament is a big factor. I use the prusa recycled filament for most of my first runs. The heat expansion is splitting hairs on their part. Maybe for science or industrial level uses its an important factor but in home hobby use, its probably next to impossible to tell if it does matter. The optimal temp is always different depending on the users environment.

I’d probably try this diamondback nozzle if I need to replace the tungsten and I can find more independent reviews. It just feels like they are banking on the diamond part being OMG its the hardest material but the ruby is almost as hard and has more field tested and reviewed history to it. Plus its got the pretty red tip while the diamonback has a gray graphite look to it.