https://wowcarry.com/blog/wow/flightstone-costs-for-enhancing-legendaries-and-weapons-with-bullions-up-to-4700-flightstones-required
Fyr'alath Legendary Guide - Upgrade Your Weapon to Max Level | WowCarry
Planning to buy a Legendary upgrade or weapon? Stock up on Flightstones! Upgrade to max item level with up to 4,700 Flightstones. Don't forget - Flightstone...
legendary guidefyrupgrade