Guam-Marr vials are a somewhat lesser known training method for Herblore where you use Guams and/or Marrentills on a vial during the Lunar Diplomacy quest. Its extremely efficient, especially for ironman accounts and grants more XP per herb than any other use for those herbs (84xp each herb).
The only downside with this method is that it becomes unavailable after you progress past the vial step in the quest.
Guam-Marr vials are a somewhat lesser known training method for Herblore where you use Guams and/or Marrentills on a vial during the Lunar Diplomacy quest. Its extremely efficient, especially for ironman accounts and grants more XP per herb than any other use for those herbs (84xp each herb).
The only downside with this method is that it becomes unavailable after you progress past the vial step in the quest.