If you are a new TH10, or in difficult wars, it might be useful to secure a safe 2 stars in War. Watch this video by Jake from OneHive. Also, 7 golems and 4 jumps strategy: It is presented as a 3 star strategy in the guide, but I use it often to secure a safe 2 star. To secure the second star, You should bring a few cleaning troops to clear out outside buildings. This will give you the precious % to make it a safe 2 star.