A Hitchhikers guide to becoming an OSF: Starting new you have to do the following. A future OSF has to first and foremost build 5 to 6 Forges level 3. Once they are done every new land u buy u put up level 3 guild on it till you LC (land complete). Remember to buy land first and then level 3 guild. Once you LC then u start working on upgrading all your existing guilds to level 4. Once all the existing guilds are level 4 then you start tearing down each forge you have one at a time to put up a level 4 guild. So this mean that u should have enough money to put a level 4 guild before you tear down a forge. Since it is hard to make money by being a pure spy the very last land should always be flexible. What I mean by that you should keep it with either level 3 forge in order to attack and make money (as a Hansel) or tear it down to put at least level 2 spy and be pure spy to feed your friends or clan mates because as an OSF that is your main purpose. While switching between the two roles you should always bank the money you made in the form of spy attack pots. Yes you will loose at least 25% when you sell them but it is better than loosing all of it if you get attacked or farmed. Last once you have all guilds level 4 except the last land you start the same process for tier 2 spy. Have enough money banked to put at least tier 2 level 3 guild before tearing down the tier 1 guild that is 27 billion gold. Also if you have nobility points do not cash them till you have one tier 4 attack building at level 3 or tier 2 spy guild level 3 because if you have this you will get 1.3 bil/15 nobility points. Other wise you only get 210 mil/15 nobility points. Last but not the least is Allies. Hansel builts live of Allies have atleast 5 to 6 bil in allies to max out ur allied plunder.
ihave always found that a bestiary works better for hansel build as income is purely allie plunder, the extra two hits from full are more useful than a couple of % more gold from the few troops you do have
The reason I have only suggested Forges because it is cheap to build and and you do not loose a lot of money when u tear it down. U can put Subs and other t3 builts but u will need level 3 of those to get good plunder. So u will have to put atleast 1.3 bil to put that and u do not get enough back when it is torn down. Remember u have to be very flexible. Unless u are planning for a long term Hansel do not put tier 3 buildings.