Once the dynamic is set, it's the little changes that screw up the effectiveness of the team. If you end up an Archmage, do the team a favor. Fire off your meteor and suicide. Last couple tips. This is still the halflife engine.
Headshots count for additional damage.
Beam their head for better life suckage as the death wizard. 4 seconds of lightning to the head kills anyone. Suicide is a poor man's teleport. Learn the respawn points and use suicide intelligently. If you dont have magic on you when you die, defenders have a MUCH tougher time rebuilding defenses.