Where can you find a decent mid ranged, say 30ish, mace?
A mid range lvl mace
If your evil look for nightfall, the oath breaker
If your good and have decent str, check out the giant ladle
if your neutral, find a tree to hug!
j/k
The sun sceptre, warded mace, heavy steel maul from the Arena, and iron maul all work well.
the barbed club, carried by the cultist near the demons, avg 20-21, rank 30ish
IT's Nightfall if you are evil, else keep to the Sun Sceptre from the Asp King as there are little options.
Enchant it if you can.
Or you can get this:
Object 'heavy steel maul arena' is type weapon, material earth.
Extra flags: socketable.
Weight is 16, value is 730, level is 13.
Weapon type is mace/club.
Damage is 4d9 (average 20).
Can be socketed.
Affects str by 1.
Affects damroll by 2. (4 Str)
Put a chain on it, so it becomes no drop.
If your evil look for nightfall, the oath breaker
If your good and have decent str, check out the giant ladle
if your neutral, find a tree to hug!
j/k
+1
Vainglory
Vainglory
...is a flail.
how about a 2-handed non rare mace a good aligned can use at around 30ish?
wizard whapper?
If you're giant sized, go for the crusader's sword. 
'bone club' is type weapon, material bone.
Extra flags: none.
Weight is 15, value is 360, level is 25.
Weapon type is mace/club.
Damage is 5d6 (average 17).
Affects damroll by 3.
Affects hitroll by 1.
~giants at Waterfall
'warded shivering mace' is type weapon, material steel.
Extra flags: magic.
Weight is 15, value is 5000, level is 35.
Weapon type is two-handed mace/club.
Damage is 4d8 (average 18).
Affects hitroll by 2.
Affects damroll by 3.
~Tainted valley
'chasm dragon bone' is type weapon, material bone.
Extra flags: antievil antineutral socketable.
Weight is 12, value is 3000, level is 40.
Weapon type is two-handed mace/club.
Damage is 6d6 (average 21).
Can be socketed.
Affects hitroll by 1.
Affects damroll by 2.
~Chasm Dragon
'heavy steel maul arena' is type weapon, material earth.
Extra flags: socketable.
Weight is 16, value is 730, level is 13.
Weapon type is mace/club.
Damage is 4d9 (average 20).
Can be socketed.
Affects str by 1.
Affects damroll by 2.
~Arena
Hope those help!
What about a high end two-handed mace for a neut?
thank you so much