For the OnTooltipSetUnit hook: Re-wrote to use "unit" instead of "mob", "trainer", and "vendor" making the code three times smaller. Instead of prefacing the recipe name with "Drops", "Sells", or "Trains", the recipe's profession is used.

diff --git a/ARL.lua b/ARL.lua
index f911a62..28fe2db 100644
--- a/ARL.lua
+++ b/ARL.lua
@@ -489,64 +489,29 @@ function addon:OnInitialize()
 				       return
 			       end
 			       local GUID = tonumber(string.sub(guid, 8, 12), 16)
-			       local mob = private.mob_list[GUID]
-			       local recipe_list = private.recipe_list
-			       local shifted = IsShiftKeyDown()
-
-			       if mob and mob.item_list then
-				       for spell_id in pairs(mob.item_list) do
-					       local recipe = recipe_list[spell_id]
-					       local skill_level = Player.professions[GetSpellInfo(recipe.profession)]
-
-					       if skill_level and not recipe.is_known or shifted then
-						       local _, _, _, hex = GetItemQualityColor(recipe.quality)
+			       local unit = private.mob_list[GUID] or private.vendor_list[GUID] or private.trainer_list[GUID]

-						       self:AddLine("Drops: "..hex..recipe.name.."|r ("..recipe.skill_level..")")
-					       end
-				       end
+			       if not unit or not unit.item_list then
 				       return
 			       end
-			       local vendor = private.vendor_list[GUID]
-
-			       if vendor and vendor.item_list then
-				       for spell_id in pairs(vendor.item_list) do
-					       local recipe = recipe_list[spell_id]
-					       local recipe_prof = GetSpellInfo(recipe.profession)
-					       local scanned = Player.has_scanned[recipe_prof]
-
-					       if scanned then
-						       local skill_level = Player.professions[recipe_prof]
-						       local has_level = skill_level and (type(skill_level) == "boolean" and true or skill_level >= recipe.skill_level)
-
-						       if ((not recipe.is_known and has_level) or shifted) and Player:IsCorrectFaction(recipe["Flags"]) then
-							       local _, _, _, hex = GetItemQualityColor(recipe.quality)
-
-							       self:AddLine("Sells: "..hex..recipe.name.."|r ("..recipe.skill_level..")")
-						       end
-					       end
-				       end
-				       return
-			       end
-			       local trainer = private.trainer_list[GUID]
+			       local recipe_list = private.recipe_list
+			       local shifted = IsShiftKeyDown()

-			       if trainer and trainer.item_list then
-				       for spell_id in pairs(trainer.item_list) do
-					       local recipe = recipe_list[spell_id]
-					       local recipe_prof = GetSpellInfo(recipe.profession)
-					       local scanned = Player.has_scanned[recipe_prof]
+			       for spell_id in pairs(unit.item_list) do
+				       local recipe = recipe_list[spell_id]
+				       local recipe_prof = GetSpellInfo(recipe.profession)
+				       local scanned = Player.has_scanned[recipe_prof]

-					       if scanned then
-						       local skill_level = Player.professions[recipe_prof]
-						       local has_level = skill_level and (type(skill_level) == "boolean" and true or skill_level >= recipe.skill_level)
+				       if scanned then
+					       local skill_level = Player.professions[recipe_prof]
+					       local has_level = skill_level and (type(skill_level) == "boolean" and true or skill_level >= recipe.skill_level)

-						       if ((not recipe.is_known and has_level) or shifted) and Player:IsCorrectFaction(recipe["Flags"]) then
-							       local _, _, _, hex = GetItemQualityColor(recipe.quality)
+					       if ((not recipe.is_known and has_level) or shifted) and Player:IsCorrectFaction(recipe["Flags"]) then
+						       local _, _, _, hex = GetItemQualityColor(recipe.quality)

-							       self:AddLine("Trains: "..hex..recipe.name.."|r ("..recipe.skill_level..")")
-						       end
+						       self:AddLine(string.format("%s: %s%s|r (%d)", recipe.profession, hex, recipe.name, recipe.skill_level))
 					       end
 				       end
-				       return
 			       end
 		       end)
 end