Magic spell tactics verses demons

[Lancewholelot]

I looking for mage tactics (using standard GURPS Magic) for dealing with demons. Banish readily jumps to mind, but the cost to cast makes it a risky spell to use on any but minor demons. Immunity to Metabolic Hazards and Mind Control are assumed, with the possibility for Magic Resistance, DR vs. Burning, and other exotic defenses in individual demons.