The most important quests would be
- the lvl 15 quests for Adena (DE village WH manager)
- lvl 15 quest on Talkin Island (Elias) makes you lvl 30 instantly and only takes 5 minutes
- lvl 40+ quest Cruma Tower (NPC just outside of the tower) for about 1kk Adena and some fine exp
- all Pailaka quests (lvl 38+/61+/73+)
- the lvl 80+ quests Wings of Sand and Legendary Tale for BEWS/Vesper weapons