I don't see many kind of Hammers and I'm afraid most hammers are Two-Handed weapons, not ?
Also a Hammer require lot's of Strength (and Agility) ...
I'm playing now a Mage that use mostly spells and a One-Handed weapon + shield (so far I know all kind of Spears are 1-handed, great!) So I use mostly a Dagger, Sword or Spear. At the moment I concentrate on finding weapons with the special "Mana Drain" or "Life Drain" feature, it's great to look how I can use almost infinitive the spell Frost against Orcs and slash the Mana drain(3) sword, eventually use Poison Weapon(1) on that sword because especially the Orcs are very vulnerable on poison ! That said I see my mana pool is sometimes filled up again to it's maximum using that sword ! If needed I can use Restoration to fill up my Vitality and go further with slashing Orcs !
Note: I believe not all kind of enemies give you Mana (like a snake, spider, bee).
Or, if you're a lucky one to find a weapon with poison dam + Mana drain together (I find such a Dagger doing poison & fire dam + life drain!).
I also draw now and then a bow to use Elemental Arrows (great against lot's of enemies!) and it use a very low pool of mana !
My Mage (I start a female Mage - Meteorestrike + Bless) is now level 28 and have around 10 free skillpoints I wait to invest in spells because I know I can find/buy spellbooks ... or gives as a reward for a quest (like Restoration!).
I buy charms to upgrade my Mana pool or Vitality. But if I find other kind of charms (like Strength/Intelligence/Agility/Constitution charms) and they're high enough to please me I use them, otherwise I sell them back. Now I'm Enchant Weapon L5 and search for good gear with a high charm quality !
Good Luck !
* or I use Heaven's Gift if I don't want to loose to many Mana using the Mana drain Sword while my Mana pool is at it's maximum whole the time I'm killing Orcs or whatever.