There has been people saying their maple reward shop has some stuff restocked and some stuff go missing after the patch.
My stock of black cube went missing, and my fury totem stock went up, and my monster park ticket stock went down too.
Equipment set progression
Pensalir -> Necromancer -> Von Leon -> Empress -> Chaos Root Abyss and Tyrants -> Absolab -> Arcane
Von Leon requires an hour pre-quest to fight, hard mode and the daily quest in this area drop stuff to make the Noble Ifia's Ring.
Empress requires a somewhat short pre-quest, recommended to bring a healing familiar like Mr. Ali (15% per 10 sec, somewhat rare drop), Platoon Chronos (10% per 10 sec, low drop rate), Mutant Snail (15% per 10 second for entire party, super rare), and potential "+1/2/3 second invincibility when attacked" on top/overall.
Zakum drops face and eye accessory.
Magnus drops shoulder, and badge.
Horntail drops a ring, earrings, pendent (part of pq set, but does not get good bonus stat).
Arkarium drops a nicer pendent than Horntail (and rarely the dominator pendent).
Pink Bean drops pocket item, a nice belt and a better face accessory than Zakum.
Hell mode Gollux drops pendent and belt, gollux coin shop has ring and earring. These 4 form a nice set bonus, but has weaker bonus stats.