It appears that new sets are now in the loot table for master writs since the Dragonhold release.
This is the first time that I've seen any for Adept Rider, Grave-Stake Collector, Naga Shamen, Nocturnal's Favor... etc...
Tenacious Dreamer - Hurricane Herald - Godslayer - Dawnbringer - Gryphon Heart - Tick Tock Tormenter - Immortal Redeemer - Dro-m'Athra Destroyer
The Unchained - Oathsworn - Bedlam's Disciple - Temporal Tempest - Curator's Champion - Fist of Tava - Invader's Bane - Land, Air, and Sea Supremacy - Zero Regrets - Battlespire's Best - Bastion Breaker - Ardent Bibliophile - Subterranean Smasher - Bane of Thorns - True Genius - In Defiance of Death - No Rest for the Wicked - Nature's Wrath - Undying Endurance - Relentless Raider - Depths Defier - Apex Predator - Pure Lunacy - Mountain God - Leave No Bone Unbroken - CoS/RoM/BF/FH Challenger
65,385 achievement points