just a suggested strategy
if you are supposed to have enough currency and/or number of your sheep is big enough to level up faster, why not considering this as a strategy
you shall sell out lifestyle, then if you are successful enough, not only you have costumers that you make them buy as many as possible of your related products[let's call whatever you use as your tool is your product, by which, not only you'll be able to climb to higher level, you'll get payback the power of your currency] , you may also have their next generations, actually they, themselves will adverse your products, just that you should perform your products along with some features supported with their current currency in their current level. In this way, using your product will become a value (which is defined by their current currency] and before their are coloured by your product completely you'll use other's tools [now, it would mean their current values] to spread your products
let's start, one may think of the basement, right now I have of a few different basement styles in my mind (thank to the time i was working in that constructional consultant company)

1- A "walk-out" or "daylight" basement is a modern architectural form where the building is situated on a slope and part of the basement is above ground. Occupants can walk out at that point without having to use the stairs. For example, if the ground slopes downwards towards the back of the house, the basement is at or above grade (ground level) at the back of the house. It is a modern design because of the added complexity of uneven foundations; where the basement is above grade, the foundation is deeper at that point and must still be below the frostline.
I recall the media for this type, I don't see any need to further explaniation on this example, in some aspects schools are examples for this type as well, consider different lifestyles suggested in education system, whatever sport, role-play, school trips, group works, case study, religion studies, different courses...., whatever is supplied in school with some extra effort can be followed by students as prospected (if potential) costumers(sheep?!) however, there’s only a slope indeed!

2- In a "look-out" basement, the basement walls extend sufficiently above ground level that some of the basement windows are above ground level. Where the site slopes gently and is insufficient for a walk-out basement, a look-out basement will result. Sometimes, a look-out basement is deliberately constructed even on a flat site. The advantage is that the basement windows are all above grade. The disadvantage is that the main floor entry is above grade as well, necessitating steps to get up to the main floor. The raised bungalow design solves this by lowering the entry half-way between the main floor and basement to make a dramatic, high-ceiling foyer. It is a very economical design because the basement is shallower, and excavation costs are minimized.
do you agree with religon as an example of this type

3-A “walk-up” basement is any basement that has an exterior entrance via a stairwell. Some designs cover the stairwell with angled “basement doors” to keep rain water from accumulating in the stairwell.

When initially built, the main floor joists are often exposed and the walls and floors concrete (with insulation, where appropriate). Unfinished basements allow for easy access to the main floor for renovation to the main floor. Finishing the basement can add significant floor space to a house (doubling it in the case of a bungalow) and is a major renovation project.

I would suggest goverments

clearly, any of which, will use other's tool to level up, if they have enough currency of course. After some thresholds the correlation is so strong that clustering is visible