Stay away from melee if you can help it unless you have bound armor for high AC at low levels. Get a bow and pelt them from a distance while your summons keeps them busy. Recast summon as soon as one dies.
Use sneak (be patient) to get into higher level dungeons, take your time, and look for containers, to get some nice loot (money and magic). If you use OOO then you might be lucky to find a room full of dead higher level monsters that may have a nice weapon or magic. This is your best bet to get some good stuff at low levels. All is fair.
I am currently level 11 and began as a mage character. As I began to level I have noticed my magica gets depleted so fast that I have begun to use melee more, but when I have a staff available I use them. The skeletal mages have nice staffs but they weigh 60lbs, so I typically use them then ditch them. I have noticed that the adventure characters that OOO adds to the world are pretty easy to kill and have nice loot.
Should I take up marksmanship over blade? I killed a bunch of braided bandits so I have a TON of good arrows and bows...
Keep the tips coming! Thanks