2. If the target tries to shift and the fighter hits with his opportunity attack, the enemy will end his movement adjacent or 1 square away?
Combat Superiority
You gain a bonus to opportunity attacks equal to your Wisdom modifier. An enemy struck by your opportunity attack stops moving, if a move provoked the attack. If it still has actions remaining, it can use them to resume moving.
Shifting does not provoke opportunity attacks, you may use combat challenge when someone shifts, only combat superiority when someone moves and provokes a OA.
2. How can a party surprise its enemies? I understand that the enemies can surprise a party while it is exploring the area, but I don't see how the opposite can happen? Since it is so difficult, aren't the feats that give you bonuses against surprised opponents worthless?
No, send in the rogue to scout and lure out an enemy while other party members are sneaking around it or waiting for a ambush..
you have 2 # 2's1. The feat Spiked Chain Training gives to the weapon defensive or not? It seems strange that all other double weapons have defensive and Spiked Chain isn't. I cant't blame though since IMO it would be too powerful with so many properties (reach, double weapon, light blade, off-hand, and defensive)
2. If the target tries to shift and the fighter hits with his opportunity attack, the enemy will end his movement adjacent or 1 square away?
Combat Superiority
You gain a bonus to opportunity attacks equal to your Wisdom modifier. An enemy struck by your opportunity attack stops moving, if a move provoked the attack. If it still has actions remaining, it can use them to resume moving.
2. How can a party surprise its enemies? I understand that the enemies can surprise a party while it is exploring the area, but I don't see how the opposite can happen? Since it is so difficult, aren't the feats that give you bonuses against surprised opponents worthless?
perhaps you should fork your questions to a new thread to get all the answers but i can give you some of them:
Where can I find the following feats Weapon Expertise
Roundabout Charge
Martial Training?