Talk:Investment walkthrough/@comment-178.253.246.11-20170804083842

Personally, I go with the following:

Chapter 1 - Premium Steel, Mine, Yhilin Bank, Stineford Magic Shop, Yhilin Beautification

Megail Route - Ardoheim Magic Trade, Yhilin Supplier, Aramite Supplier, Desert Bounty Office, Eustrin Manufacturer, Eustrin Embassy

Reunion - Bribe all Mercs, Cache, Bridge, Yhilin Bank Core Lender, Yhilin Public Works 2

Ardford - Everything except Mercenary Flotilla and Bank of Ivala. 50k investment in Order of Silence.

Premium Steel Ownership upon return to Yhilin.

As far as I can tell, it trades a slightly worse performance at Battle of Yhilin for a strong position for future investments after the war against Incubus King.