Any other ways to get Tyria exp?
You should at least gain experience for killing foes in fractals, so choosing fractal levels with many foes might be a way to go.
Other than that, all the “regular” ways to gain experience should work. Map-unfogging and -exploration on alts, playing personal story missions, killing foes left, right, and center, doing events, dungeons (should be around 60k per dungeon path on a level 80 plus whatever you kill inside), world bosses, champ trains, harvesting, and so on.
The best advice probably is to ignore your xp bar and just do a multitude of activities you enjoy to make time pass faster . And don’t forget to bring your harvesting tools, those xp from picking flowers and berries at the roadside do add up.
Go run around in the SW.