The wiki is currently organized after how editor functions are written. I'm missing a department where you can write blueprint/strategies for how to reach a goal. Its not like tutorials, they go through step by step very carefully. This would be more general advice. Like:
You can place units in 4 different ways
Using the editors unit list (tutorial 1, tutorial 2)
Using triggers (tutorial 1, tutorial 2...)
Using the Data editor - building units with units (tutorial 1, tutorial 2...)
Using the AI.
As a beginner you should stick to the world editor and place the units directly. More advanced users should start experimenting with the triggers. The data editor and AI is more complex.