your right swing (the swing from the right towards the left) has more reach than all of the crushthrough weapons. You can always get the first hit in the fight that way.
The right swing from a onehanded weapon adds a lot of length but takes a while to hit, and by using that you make sure they don't get first hit [and possible crushthrough on you].
After you have hit him (or made him block), spam left swings at him while facehugging. Attack first and keep attacking even when he blocks, only block when you see them do a side swing. If they try to overhead you, you will always hit them with your left swing and kill them even if they block then swing.
happy hunting.
Yeah speed usualy works, but in some case you can't spam if the guy parry you and strike back which is a win for him.
In a duel it's not that hard but if they're is another guy with him, you should prepare to die...
Footwork is very important (you have to get as much athletics as you can). Mauler is like a big train - he can't really maneuver. Slide to sides and strike him down. Jump around if you can't avoid him - or just run away. If you know for sure, that you can't kill him (tough armor, skills) try to distract him from crushing your teammates as long as possible.If you follow my fighting guide, you will always counter him so he can't crush you. They have no chance to overhead. Practice it :)
Its not that easy, good hammerguy in heavy armor can cause a glance by good footwork and you are dead man.you've got time to hold your attacks for a slight second. I rarely glance, and if i do, it is my fault of bad footwork on my end not good footwork on their end.
The above posts have great suggestions, but to add one point in:Its not the weight i believe. Its more about the weapon's long. If you are too close the mallet/maul will hit with the stick first, and that hit wont crush. The head of the weapon is what has to impact to get the better results. Lets say, the farter away you are from an enemy, the better is the hit when you actually hit.
You could use heavy weapons to block their crushthroughs (Not exactly sure what the prerequisites on the weapons are)
I've used Long Hafted Spike Mace to blockaseveral crushthrough attacks from a mallet.
It's stats:(click to show/hide)
And my shield can block crushthrough from mauls, but not mallets. (Maybe it has something to do with the weight? If someone would give a link and clarify this would be nice for me, too!)