If you want long time planning, please check also the LeveQuest achievements.

10k Leve for Battlecraft (DoW/DoM), achievement "Region d'Etre"

10k Leve for Fieldcraft (DoL), achievement "Field of Dreams"

10k Leve for Tradecraft (DoH), achievement "Lost in Localization"

Around 1.5K Leve for the 3 Grand company (500 each), achievement "The Turquoise Cannon", "The Ironwood Leaf". "The Silver Scales"

6 Leve per day, that makes 5260 days to complete or little less than 14.5 years.

yeah... I'm usually an achievement hunter but I don't think I'll do it on this one...