The satisfaction and triumph I got after beating Liadri, on the 15th-ish go, was a feeling I haven’t had in GW2 for a while, so I personally would enjoy seeing something of a similar difficulty, or maybe even harder if it meant a nice reward.
Also, knowing how the battle works, and how all the attacks play out, and forming a strategy based on that, is much more important than squeezing an extra 2% damage out of traits or gear. The one hits are far more likely to kill you than Liadri herself, so emphasise mobility, and make sure you at least have enough damage/aren’t to squishy so you don’t run out of time.