My experimental economist chart is shown below. This one focuses heavily on resource gathering, although at first you will be rather weak. These might also be useful careers

. I also think you should have a scientific branch, but for now:
-Economist (harvesting bonus, item price discount, etc., but all of these bonuses are very slight, prompting specializiation)
--Farmer (more harvesting bonus, can get special buildings like cow pens to increase gold income, gets a bonus on harvesting crops, more melee damage [plows hurt], etc., and all branches of farmers get buffed workers)
---Blue Ribbon Livestock Raiser (more animal bonuses and types of animals you can raise and then eat, also gives you some defensive and offensive options [UNLEASH THE POWER OF THE BULLS UPON YOUR FOES AND TRAMPLE THE GHOULS WITH HORSES AND PECK TO DEATH THE SKELETONS!] that are related to animals, and the hero himself gets a mount of some sort)
---Agriculturalist (gets heavy crop bonuses and crops grow faster, gets longer LoS, get more max food, etc.)
--Banker (get more gold income, harvest more gold from gold mines, immune to [or perahps overly suscutible to] Underground thievary with all branches, etc.)
---Merchant (trader --- all units get inventory and can buy/sell items, get more money for buying or selling items, more movement speed, large gold mining bonus)
---Net Potiental Financialist (everything costs less, you get 5% more money from when people give you gold or lumber, faster upgrade times)