diff --git a/mods/ENTITIES/mcl_mobs/api/api.lua b/mods/ENTITIES/mcl_mobs/api/api.lua
index c7d92c1e66..df267b0526 100644
--- a/mods/ENTITIES/mcl_mobs/api/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api/api.lua
@@ -45,6 +45,7 @@ local math_floor  = math.floor
 
 -- localize vector functions
 local vector_new    = vector.new
+local vector_add    = vector.add
 local vector_length = vector.length
 local vector_direction = vector.direction
 local vector_normalize = vector.normalize
@@ -328,8 +329,13 @@ function mobs:register_mob(name, def)
 		attacking = nil,
 		visual_size_origin = def.visual_size or {x = 1, y = 1, z = 1},
 		punch_timer_cooloff = def.punch_timer_cooloff or 0.5,
-		projectile_cooldown = def.projectile_cooldown or 2,
 		death_animation_timer = 0,
+		hostile_cooldown = def.hostile_cooldown or 15,
+		tilt_fly = def.tilt_fly,
+		tilt_swim = def.tilt_swim,
+		fall_slow = def.fall_slow,
+		projectile_cooldown_min = def.projectile_cooldown_min or 2,
+		projectile_cooldown_max = def.projectile_cooldown_max or 6,
 		--end j4i stuff
 
 		-- MCL2 extensions
@@ -353,10 +359,6 @@ function mobs:register_mob(name, def)
 		ignited_by_sunlight = def.ignited_by_sunlight or false,
 		eye_height = def.eye_height or 1.5,
 		defuse_reach = def.defuse_reach or 4,
-		hostile_cooldown = def.hostile_cooldown or 15,
-		tilt_fly = def.tilt_fly,
-		tilt_swim = def.tilt_swim,
-		fall_slow = def.fall_slow,
 		-- End of MCL2 extensions
 
 		on_spawn = def.on_spawn,
@@ -478,9 +480,7 @@ function mobs:register_arrow(name, def)
 			if self.timer > 150
 			or not mobs.within_limits(pos, 0) then
 				mcl_burning.extinguish(self.object)
-				print("removing 1")
 				self.object:remove();
-
 				return
 			end
 
@@ -489,8 +489,10 @@ function mobs:register_arrow(name, def)
 			and def.tail == 1
 			and def.tail_texture then
 
+				--do this to prevent clipping through main entity sprite
+				local new_pos = vector_add(pos, vector_multiply(vector_normalize(vel), -1))
 				minetest.add_particle({
-					pos = pos,
+					pos = new_pos,
 					velocity = {x = 0, y = 0, z = 0},
 					acceleration = {x = 0, y = 0, z = 0},
 					expirationtime = def.expire or 0.25,
diff --git a/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua b/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua
index ac5561adbf..7907f8c47d 100644
--- a/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua
+++ b/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua
@@ -2,6 +2,7 @@ local vector_direction = vector.direction
 local minetest_dir_to_yaw = minetest.dir_to_yaw
 local vector_distance = vector.distance
 local vector_multiply = vector.multiply
+local math_random  = math.random
 
 --[[
  _   _                     _   _ 
@@ -208,7 +209,7 @@ mobs.projectile_attack_walk = function(self,dtime)
 
     --do this to not load data into other mobs
     if not self.projectile_timer then
-        self.projectile_timer = self.projectile_cooldown
+        self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
     end
 
     --run projectile timer
@@ -218,7 +219,7 @@ mobs.projectile_attack_walk = function(self,dtime)
         --shoot
         if self.projectile_timer <= 0 then
             --reset timer
-            self.projectile_timer = self.projectile_cooldown
+            self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
             mobs.shoot_projectile(self)
         end
     end
@@ -291,7 +292,7 @@ mobs.projectile_attack_fly = function(self, dtime)
 
     --do this to not load data into other mobs
     if not self.projectile_timer then
-        self.projectile_timer = self.projectile_cooldown
+        self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
     end
 
     --run projectile timer
@@ -301,7 +302,7 @@ mobs.projectile_attack_fly = function(self, dtime)
         --shoot
         if self.projectile_timer <= 0 then
             --reset timer
-            self.projectile_timer = self.projectile_cooldown
+            self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
             mobs.shoot_projectile(self)
         end
     end
diff --git a/mods/ENTITIES/mcl_mobs/api/mob_functions/collision.lua b/mods/ENTITIES/mcl_mobs/api/mob_functions/collision.lua
index 43b7592692..b56a0d3921 100644
--- a/mods/ENTITIES/mcl_mobs/api/mob_functions/collision.lua
+++ b/mods/ENTITIES/mcl_mobs/api/mob_functions/collision.lua
@@ -39,7 +39,7 @@ mobs.collision = function(self)
 	end
 
 	for _,object in ipairs(minetest_get_objects_inside_radius(pos, radius*1.25)) do
-		if object and object ~= self.object and (object:is_player() or object:get_luaentity()._cmi_is_mob == true) then--and
+		if object and object ~= self.object and (object:is_player() or (object:get_luaentity() and object:get_luaentity()._cmi_is_mob == true)) then--and
 		--don't collide with rider, rider don't collide with thing
 		--(not object:get_attach() or (object:get_attach() and object:get_attach() ~= self.object)) and 
 		--(not self.object:get_attach() or (self.object:get_attach() and self.object:get_attach() ~= object)) then