I'd say Fractal even more so if I'm there to farm tomestones of Law. Sure there is more trash mobs but they also die quicker than in Neverreap plus most of the bosses are more "noob friendly" in Fractal making this dungeon less prone to wipes plus Fractal is one of my two favorites dungeons of Heavensward with The Vault. The only downside of Fractal is that there is nothing to loot there...