more stuff i can't guarantee works by itself yet

code/modules/mob/dead/observer/observer.dm

@@ -146,13 +146,13 @@ GLOBAL_VAR_INIT(observer_default_invisibility, INVISIBILITY_OBSERVER)
 	var/old_color = color
 	color = "#960000"
 	animate(src, color = old_color, time = 10, flags = ANIMATION_PARALLEL)
-	addtimer(CALLBACK(src, /atom/proc/update_atom_colour), 10)
+	addtimer(CALLBACK(src, TYPE_PROC_REF(/atom, update_atom_colour)), 10)
 
 /mob/dead/observer/ratvar_act()
 	var/old_color = color
 	color = "#FAE48C"
 	animate(src, color = old_color, time = 10, flags = ANIMATION_PARALLEL)
-	addtimer(CALLBACK(src, /atom/proc/update_atom_colour), 10)
+	addtimer(CALLBACK(src, TYPE_PROC_REF(/atom, update_atom_colour)), 10)
 
 /mob/dead/observer/Destroy()
 	GLOB.ghost_images_default -= ghostimage_default

code/modules/mob/living/say.dm

@@ -323,7 +323,7 @@ GLOBAL_LIST_INIT(department_radio_keys, list(
 		for(var/i in 1 to barks)
 			if(total_delay > BARK_MAX_TIME)
 				break
-			addtimer(CALLBACK(src, /atom/movable/proc/bark, listening, (message_range * (is_yell ? 4 : 1)), (vocal_volume * (is_yell ? 1.5 : 1)), BARK_DO_VARY(vocal_pitch, vocal_pitch_range), vocal_current_bark), total_delay)
+			addtimer(CALLBACK(src, TYPE_PROC_REF(/atom/movable, bark), listening, (message_range * (is_yell ? 4 : 1)), (vocal_volume * (is_yell ? 1.5 : 1)), BARK_DO_VARY(vocal_pitch, vocal_pitch_range), vocal_current_bark), total_delay)
 			total_delay += rand(DS2TICKS(vocal_speed / BARK_SPEED_BASELINE), DS2TICKS(vocal_speed / BARK_SPEED_BASELINE) + DS2TICKS((vocal_speed / BARK_SPEED_BASELINE) * (is_yell ? 0.5 : 1))) TICKS
 
 

code/modules/mob/living/simple_animal/hostile/megafauna/colossus.dm

@@ -113,7 +113,7 @@ Difficulty: Very Hard
 /obj/effect/temp_visual/at_shield/Initialize(mapload, new_target)
 	. = ..()
 	target = new_target
-	INVOKE_ASYNC(src, /atom/movable/proc/orbit, target, 0, FALSE, 0, 0, FALSE, TRUE)
+	INVOKE_ASYNC(src, TYPE_PROC_REF(/atom/movable, orbit), target, 0, FALSE, 0, 0, FALSE, TRUE)
 
 /mob/living/simple_animal/hostile/megafauna/colossus/bullet_act(obj/item/projectile/P)
 	if(!stat)

code/modules/mob/living/simple_animal/hostile/megafauna/demonic_frost_miner.dm

@@ -180,7 +180,7 @@ Difficulty: Extremely Hard
 			P.original = target
 		P.set_homing_target(target)
 		P.fire(rand(0, 360))
-		addtimer(CALLBACK(P, /obj/item/projectile/frost_orb/proc/orb_explosion, projectile_speed_multiplier), 20) // make the orbs home in after a second
+		addtimer(CALLBACK(P, TYPE_PROC_REF(/obj/item/projectile/frost_orb, orb_explosion), projectile_speed_multiplier), 20) // make the orbs home in after a second
 		SLEEP_CHECK_DEATH(added_delay)
 	SetRecoveryTime(40, 60)
 

code/modules/mob/living/simple_animal/hostile/megafauna/hierophant.dm

@@ -248,7 +248,7 @@ Difficulty: Normal
 							blinking = TRUE
 							sleep(4 + target_slowness)
 						animate(src, color = oldcolor, time = 8)
-						addtimer(CALLBACK(src, /atom/proc/update_atom_colour), 8)
+						addtimer(CALLBACK(src, TYPE_PROC_REF(/atom, update_atom_colour)), 8)
 						sleep(8)
 						blinking = FALSE
 					else
@@ -267,7 +267,7 @@ Difficulty: Normal
 							INVOKE_ASYNC(src, .proc/diagonal_blasts, target)
 						sleep(6 + target_slowness)
 					animate(src, color = oldcolor, time = 8)
-					addtimer(CALLBACK(src, /atom/proc/update_atom_colour), 8)
+					addtimer(CALLBACK(src, TYPE_PROC_REF(/atom, update_atom_colour)), 8)
 					sleep(8)
 					blinking = FALSE
 				if("chaser_swarm") //fire four fucking chasers at a target and their friends.
@@ -292,7 +292,7 @@ Difficulty: Normal
 						sleep(8 + target_slowness)
 					chaser_cooldown = world.time + initial(chaser_cooldown)
 					animate(src, color = oldcolor, time = 8)
-					addtimer(CALLBACK(src, /atom/proc/update_atom_colour), 8)
+					addtimer(CALLBACK(src, TYPE_PROC_REF(/atom, update_atom_colour)), 8)
 					sleep(8)
 					blinking = FALSE
 			return

code/modules/mob/living/simple_animal/hostile/wumborian_fugu.dm

@@ -96,7 +96,7 @@
 	F.environment_smash = ENVIRONMENT_SMASH_WALLS
 	F.mob_size = MOB_SIZE_LARGE
 	F.speed = 1
-	addtimer(CALLBACK(F, /mob/living/simple_animal/hostile/asteroid/fugu/proc/Deflate), 100)
+	addtimer(CALLBACK(F, TYPE_PROC_REF(/mob/living/simple_animal/hostile/asteroid/fugu, Deflate)), 100)
 
 /mob/living/simple_animal/hostile/asteroid/fugu/proc/Deflate()
 	if(wumbo)