So it seems 4 is the minimum requirement for a party and 8 is the max. My questions are:
1. If you have 8 does that make the dungeon hard/heroic mode?
2. Can you do a dungeon with 5, 6 or 7 and if so will more than 4 always make the dungeon hard mode (If the answer to 1 is yes)
3. Also if the answer to 1 is yes, will hard/heroic mode drop better loot?