Diablo – Is it even possible to have a melee based class play a range style in Diablo 3

All skills in diablo 3 (other than certain demon hunter skills that require bows) can be used while wielding any type of weapon, be it one handed, two handed or dual wielding. The majority of the skills in the game have a % weapon damage associated with it and deals damage based on the damage as shown on the weapon (NOT the dps value on your character screen).

You'll notice that for weapon throw, no matter what you wield you'll always throw an axe (unless you use the throw hammer rune).

According to this source, a map can have multiple events generated. This includes caves, houses, dungeons, and other sub-maps as well. However, there are a limited number of "spaces" (officially called Tiles) within a map where an event can spawn, and there are traditionally more Events than there are tiles for a map. Not every Event available to a map or Act will be able to spawn in one run of that Map. You would need to Leave the game session and start a new one to get different Events to spawn.