I traveled to this town (forgot the name of it), but its the one where spawns come out of the castle and I had to convince the blacksmith to help the army/towns folk fix their stuff.

So at night when the spawns come out and my team and I fight them. How do I win it? The first batch up on the hill is a piece of cake but then a knight comes over and asks me to help on the bottom so I go and thats where my team gets slaughtered and I am not strong enough to handle 4-6 spawns on my home since I am a mage. So the only thing I can do is run back upstairs to where I was before and have those 4 knights help me out while I run in circles waiting for my mana to be replenished and turn around and attack once and do it all over again.

Anyone have any ideas?

the name of the town is redcliff
who do you use?
Do you have it set up so your party members will use potions when they get low on health?
make sure your tactics are set up correctly so your team will use there most effective attacks.

when you go down the hill, you can lure the zombies or w/e they are back up the hill to where your other "party" is. you can do this as much as you want

If you have a tank send them down and stand up on top If you dont have anyone that can tank you probably should go somewhere else for a bit till u get ur level up then come back after a few levels.
Also if your are playing on nightmare or hard try changing the difficulty for that section.