Spider

Giant Spider
Usually come in swarms, un-burrowing or climbing towards the players when they walk too close. Their low health makes them easy to deal with.

Strategies
AOE Electricity preforms very well. Usually a 5-charge electricity plus Shift + Right Click can clear the area.

Poison Spider
Poison spiders are like giant spiders, but they use long-range attacks. They spit poison on you repeatedly until slain.

Strategies
Use a to prevent yourself from being poisoned, then choose your choice of attack (just about anything will work).

If you happen to be poision a simple healing spell will cure you. Another tactic is to cast an Earthquake ( + shift) with a Fire element to knock them back and cause damage at the same time. This tactic will take a long time however the spiders can not attack you as they as they are being knocked back. The more Fire the stronger the spell.