I eventually settled on making Karhun into a human warlord, and then using our multiclass system to dip into some wizardly bits. I’ve been tanking a lot for the party anyway, so converting to a melee-competent base class seemed pretty reasonable, and multiclassing wizard means that I can get more out of my character’s outstanding Intelligence score. The wizard abilities I gained give Karhun a couple of decent ranged area attacks each encounter, something warlords otherwise wouldn’t get a lot of. That means I’ve got lots of flexibility. ...
...Then Karhun got his turn; I used one of those multiclass abilities I was talking about, and used a wand attack on more of the vampires. We discovered, much to our relief, that we were facing vampire minions—dangerous if they mob you, but otherwise easy prey for some big AoE attacks like the sort we were throwing out.
On my next round I saw several bad guys lined up in a row, so Karhun dashed a few squares over and used another wizard ability—my once-per-day scorch, a powerful fire attack. Karhun blasted two mummies and a hapless vampire minion for a pile of fire damage. After that, we were down to just a couple of monsters left, so Karhun switched over to melee attacks and spent the rest of the fight laying about him with his sword. I rolled pretty badly from that point on and managed to miss for the next three swings. Fortunately, the other players picked me up, and we finished off the mummies without too much trouble.