I'm sure this topic has been covered before but I'm interested in anyone can point me in the direction of game formula links or drop information.

As an example I killed Nottingham Deputies for a perriod of about an hour, over that hour i must have collected about 60 or so equipment drops and no crafting reagents. My luck buff expired at that point and low and behold I start finding crafting mats, not at the most constant rate but i was interested if anyone knows anything particularly about the drop rate and luck formula?

Thanks Ausma

Outside Dungeons, in my experience, humanoid mobs (like the Deputies, Anubians, Faerie-Sworn, etc.) tend to drop armour and weapons.  Animal mobs drop crafting components. 

Inside Dungeons, the humanoid mobs still drop armour and weapons mostly but each dungeon seems to have a crafting component or two that is more common even on humanoid mobs.

As for Luck, not really certain how drops are affected myself. 

Eartheternal.info has pages on most crafting items, showing what drops them. As Freiguy said, when something decent drops from a mob, bipedal mobs usually drop armor, and animal mobs usually drop components. This isn't always the case, but it is a good rule to go by when looking for specific drops.

Thanks for the response Lungorthin the info page is a great help but the main reason i posted was to find out more about the effects of the Luck Modifier on item drop rates.

I am aware of posts such as "Crafting Materials Guide" in the Newbie yard however was hoping for something a bit in depth.  This is also another reason why I chose killing "enthralled deputies" for an hour as they are a mob advertised to drop the mat "rough gem".

With that in mind I have used the EE info page to find their drop stats and so I am off to kill 1000 deputies with varying levels of Luck to find answers.