Dwarfworld Sentinels 3
From Xhodon
Attacking Sentinels
Attacking sentinels will not earn your hero experience for killed sentinel creatures. Only your own casualties will give some experience.
To slay sentinels of level 3, a minimum of 4000-4500 Goblins (or creatures of equivalent strength) is required. To keep casualties as low as possible, attack with 7000 or more.
You will need up to 200 Unicorn Carts to carry the loot.
Defending Sentinels
To defend a sentinel, move a hero to its valley and set his defense status to "Valley defense". Setting the defense status to "Area defense" will not defend sentinels as they do not count as allied units.
Example Sentinel
Other Sentinels level 3 may be stronger or weaker. Accordingly, they leave more of less loot for you.