replace magic numbers related to emp and explosion severity with defines (#26495)

replace even more magic emp and ex numbers

code/game/objects/items/weapons/twohanded.dm

@@ -722,12 +722,12 @@
 		if(HAS_TRAIT(src, TRAIT_WIELDED))
 			if(iswallturf(A))
 				var/turf/simulated/wall/Z = A
-				Z.ex_act(2)
+				Z.ex_act(EXPLODE_HEAVY)
 				charged = 3
 				playsound(user, 'sound/weapons/marauder.ogg', 50, 1)
 			else if(isstructure(A) || ismecha(A))
 				var/obj/Z = A
-				Z.ex_act(2)
+				Z.ex_act(EXPLODE_HEAVY)
 				charged = 3
 				playsound(user, 'sound/weapons/marauder.ogg', 50, 1)
 

code/game/objects/items/weapons/weaponry.dm

@@ -272,7 +272,7 @@
 		var/atom/throw_target = get_edge_target_turf(target, user.dir)
 		user.visible_message("<span class='userdanger'>It's a home run!</span>")
 		target.throw_at(throw_target, rand(8,10), 14, user)
-		target.ex_act(2)
+		target.ex_act(EXPLODE_HEAVY)
 		playsound(get_turf(src), 'sound/weapons/homerun.ogg', 100, 1)
 		homerun_ready = 0
 		return