The order matters considerably more than the effort, and two of the steps take under a minute each. Almost all of the eventual cost is set before lunchtime.
Most families use all four and rarely decide the proportions on purpose. The order they are drawn on changes the total cost of the degree considerably.
Retention money usually gets spent on whichever lever is easiest to pull. The options differ enormously in how long the effect lasts and what it actually costs.
The offer refused in month two is often better than the outcome reached in month fourteen, once somebody counts what the intervening year actually took out of them.