This trophy is true to its name, don't expect to get this trophy if you are not used to playing on Expert difficulty.
The Good News: Guitar Hero Warriors of Rock's Hammer ons are possibly the smoothest they have been since Guitar Hero 3.
The rock meter in this game seems to be more lenient than previous games.
This song is not as bad as Jordan (GH2) or Through the Fire and Flames (GH3) when thinking in terms of being able to pass the song.
The worst part of the song in my opinion uses Tap notes which are easier to hit and you are much more likely to pass the section.
The Bad News: This song consists mostly of sweeping solos.
You can't do power challenges for this one like you can for Fury of the Storm on Drums. You have to play this song outside of Power challenges meaning you cannot use the Quest power ups.
The song seems to alternate between easier and harder sections rather a lot and rather rapidly. Just because you're doing fine one moment does not necessarily mean that you will be fine the next moment.
It's hard to name particular sections of the song as they are all have a particularly hard intensity, my best advice would be to save star power for when you really need it.
The song does get harder as it goes along but not too much harder, there is a section which is full of tap notes and that is a sign that you are close to the end of the song. If you pass this section, you're home as the song winds down shortly after.
The song may also seem harder later on as your hands will become tired from the intensity of the song, stuff that seems easy you may miss for this reason.
This song is still tough but it is not as tough as tricky songs from other guitar hero games, the game engine in this game partially makes this song easier to do.
Best of luck to all of you.