LPT: If you're looking for fast Experience gain for Skyscale masteries (or Karma), Specimen Chamber pre-event is a good choice : r/Guildwars2
BDO All guild Quest XP and Silver Rewards
Guild Wars 2 on Twitter: "Catch up on story, brush up your Masteries, and prepare for The #IcebroodSaga with the Expansion Boost Special Event! From today until September 17, you'll gain double
Guild Wars 2 Forum - Guild Wars 2: Heart of Thorns
Training vs Mastery: EXP Items for Mount Leveling, Mastery, & Life | GrumpyG
Guide to exp boosting : r/Guildwars2
Max Mastery 366 - MMOPILOT - Trusted Power Leveling Service