since nexon is still down >.< all i have left is to ask a lot of questions while i wait .....i dont really play much and im noticing some of my gear for enhancing need some? where in the world do i get it? besides the market for 1g+...
The best places to farm crude onyx is Santuary Nexus (Lv16+) at Master (Abyss takes too long and the drop rates aren't even as good), and Prayer's Retreat (Lv22+?). Both dungeons have large amounts of mobs so it's always fun to pick up a bunch of stuff (including crude onyxs) after clearing the mob.
I personally prefer farming at Prayer's Retreat because the boss (Manticore) drops Poison Essence which is used for crafting some Goblin Windswept equips (each poison essence worths around 20+ gold each on market from the last time I checked).
Sanctuary Nexus is your best bet for regular drops like blues,onyxes and blues. However, if you want specific crafting items you would have to go to that specific dungeon. Another option would be Astral if you can't handle Nexus.