Hey guys, I have a low-strength (20) low-armor caster character (magic: 30), and I've just found a fun and easy way to beat some of the toughest enemies in the game, which I thought I'd share.
In your right hand, equip a Great Club and your favorite wand / talisman. In your left, pack a Kris blade (preferably leveled up). If you don't have a leveled Kris blade, you can also pack the Monk's Headdress and/or a Ring of Magical Sharpness.
What you do is dodge your enemy's first attack, and smack him with the club to knock him to the ground. Quickly switch to your wand and blast the enemy with Firestorm as they're getting up.
I can kill katana skeletons and red-eye knights in one hit with this combo, and black phantoms generally go down in two or three hits. Good times!