http://www.elvenarchitect.com/city/planner/993d24e33cf3445f9e9523f207270d20/
^^This should take you to my plan for the set buildings. The footpaths just show where the road runs and how it will connect to the set. I'm very early in Orcs; just built my first Rally Point. For me, the Orc Vortex is my main focus. From what I've read, once I finish Orcs (in a few months, apparently) my culture needs will change because of the introduction of mana. I arranged the 'culture zone' to make it easier to transition everything to Willows. So, I'm using the event buildings to set up my Orc chapter only, planning on everything being sold off in Woodelves. I've gotten a shipwreck and also plan to make a modest attempt on the sleighful of ice cubes; both will replace existing lower culture buildings.
Of the set buildings on the plan, I already have 1 hand & 2 fountains. I have finished the sequential quest line of the event and have 3367 keys, so good odds of getting the 2 vortexes and will get the Troll as well. I'm still unsure if the fountains are going to give supplies or elixir, but my primary goal is to get as many bonuses as possible on the other buildings either way. I'm shoring up workshops to prepare for the possible decline in supplies anyway and I've saved a bunch of instants for this chapter on purpose to help with supplies.
I think this is the most efficient placement for the set. I've worked with it so long, I can't see any other arrangement that works as well. If anyone has any ideas, let me know.
Knowing I will still gain keys from daily quests and pick-ups, I should have more by the time the vortex comes up. How many keys do you think I should hoard for the vortex day? I'm only opening the small chest to try to smooth out the randomness. I'm trying to get an idea of what other buildings I might try for since it looks like the vortex will be close to the end of the event. I have space for an additional sleighful of ice cubes if I get the first one quickly, but I'm trying to establish how many keys I will throw at it before stopping. Also, still have time to see if there are additional buildings coming out that might be useful instead.
**I promise not to come here and threaten to quit if, despite my best efforts and planning, I end up with 0 vortexes or sleighs.**
I made an A in statistics decades ago; I understand how odds work: they don't stack, they reset with each attempt.