I have found a layout that will work well for the needs of my cities. Two of the 4 set buildings only give supplies (at my level, at least). Since I don't have an issue with running low on supplies, the bonus links for the Frozen Fountain & the Orc Vortex are not as important to me as the links for the Giant's hand & the Mountain Troll. In one city, I placed the Frozen Fountain even with the top left side of the Giant's hand. I placed the Mountain Troll on the right side of the Giant's hand & shifted it up to leave one empty row on the bottom right of the Giant's Hand. This is where I was able to position the Orc Vortex. This gives me 3 links for the Giant's hand, two links for the Mountain Troll & Orc Vortex & 1 link for the Frozen Fountain. Above is the picture of how I placed them.