These are some snippets from around the web, mostly from Clash’s Wiki sites.
dragons – keeping your Air Defenses semi-spread while protecting them with Storages and other high hitpoint buildings is the key to preventing most 3-star attacks using Dragons. If the Air Defenses are too close together, a single Rage Spell applied to a cluster of Dragons can quickly wipe out all three.
Archers have no preferred target when attacking; they will simply attack the closest building to them
Barbarians have no preferred target when attacking; they will simply attack the closest building to them
Giants prioritize defensive structures above all other targets
The Wall Breaker attacks by locating the nearest protected (read: wall enclosed) building
Balloons prioritize defensive structures above all other targets
Wizards have no preferred target when attacking; they will simply attack the closest building
P.E.K.K.As have no preferred target when attacking
Baby Dragons have no preferred target when attacking; they will simply attack the closest building
Miners have no preferred target when attacking; they will simply attack the closest building
Minions have no preferred target when attacking
Seeking Air Mines do not detect Minions, but regular Air Bombs do
Hog Riders prioritize defensive structures above all other targets,
A way to defend against Hog Riders is to exploit the fact that they will attack the closest defensive building. You can arrange your base in such a way so that you have high-powered defenses on the inside and lower-powered defense on the outside, with a layer of resources in between. That way, the Hogs will (in theory) complete a loop around your base before being able to attack your interior defenses (Inferno Towers, X-Bows, etc.), by which time they should have all been killed by the interior defenses.
Hog Riders can be easily killed using “forced pathing”. Forced pathing is a strategy that manipulates the Hog Rider AI and make them go to at least 2 Defenses that cannot be prevented by surgical dropping or side clearing. Placing a set of Giant Bombs in between the two can most certainly guarantee you a defensive win.
Valkyries have no preferred target when attacking
Whenever Valkyries destroy a building, they will reposition themselves, which during that time, they could get shot down. Try to put buildings with different hitpoints together to hinder a Valkyrie army.
Barbarian King – Starting at level 5, the Barbarian King obtains an ability called Iron Fist which can be used on the battlefield. It partially heals him, summons up to twenty additional Barbarians and grants the Barbarian King and any surrounding Barbarians increased damage and speed
Congrats to ShotsInHeaven for getting co-leader. Why, you might ask. Simple, he listened and worked hard (my take, not the leaders). Shots base was not at the level it is now (not talking about TH level). He took advice from the leaders and ?, and his attacks became much better. This is with being in a different time zone then the rest. And he is helping others in the clan. And he has been here for a good amount of time. Co-leader in this is clan is something only a few will earn.