A good way to deal with unwanted ennemies that you don't want to destroy is to teleport them away.
1- Create a portal an area you've already visited and won't be coming back to.
2- Leave area and seek out ennemies (or let ennemies seek you out)
3- When ennemies approach (or when you're almost dead), teleport them.
4- Tada... no more bad guys. The only bad thing is that you don't get the XP but it works like a charm.
Of course, if you can teleport them, you can probably icestorm them to death to