If you want to limit your opponents’ neutral creep income, neutral warding comes into play. Keep in mind that wasting observer wards on this can limit your vision. If you want vision in the area, feel free to use observer wards. The drawback of using observer wards is that they are easy to deward if not placed in trees, which will not provide vision so you might want to think about blocking via sentry wards.
Neutral warding should be considered if you want to shut down jungle heroes like Enigma and Chen. Another example is against heroes that can clear any stack easily, like Tinker and Luna. Blocking their neutral creep spawns can throw off their game completely.
Neutral Ward Objectives:
Prevent neutral creep spawn
Provide vision at certain creep spawns in order to contest them
This ward placement is from the dire point of view. The bottom ward blocks both the hard and the small camp. The top ward blocks the ancient spawn.
6.4 Rune Ward
Is a rune ward always necessary? The answer is short and easy: no. There are several reasons why rune wards in general should not be placed just to have vision on the rune.
6.4.1 Why Rune Wards Should Be Avoided
At first, wards are very limited. If you waste a ward just to have rune vision, more important wards cannot be placed. Runes should be contested by the support duo which scouts and or secures them. Why would you ward the rune if you are there when it spawns? The second thing that comes to mind is the fact that there are several heroes that can provide vision on the rune when it’s necessary. There are long range spells or summons which can scout the rune.
Example: A position four Enigma is in the jungle. Every time the rune spawns he sends a low hit point Eidolon to the rune near him. When it spawns, he can see it and deny it if necessary.
6.5.2 Rune Ward Conclusion
Rune wards are nice to have, but not necessary. Keep your wards for more important tasks. When there are wards that fulfill a purpose and provide rune vision, good. But never waste wards just to have vision on the rune.