Here's how I handle touch combat spells:
Direct Touch: The touch attack is a separate test, but considered part of the spellcasting action (melee attacks are always Complex Actions, though, so you can't use reckless spellcasting with touch combat spells). Roll Unarmed Combat + Agility + 2 [Physical] vs. the target's Reaction + Intuition defense test for the touch-only attack (see p.187). Extra hits on the touch attack are good for style, maybe, but have no real benefit. If you succeed on the touch, then cast the spell: Spellcasting + Magic [Force] vs. (Body or Willpower) + Counterspelling (if any).
Indirect Touch: Like Direct combat touch spells, the touch attack is a separate test that happens in the same Complex Action as the spellcasting test. Roll Unarmed Combat + Agility + 2 [Physical] vs. Reaction + Intuition. If you succeed, then cast the spell. Here's where Indirect differs from Direct: Indirect combat spells are resisted with a regular Reaction + Intuition defense test, but the target already had one to avoid the indirect touch spell, and failed. They don't get a second bite at that apple; they can resist with Counterspelling, but that's all. Roll Spellcasting + Magic [Force] vs. Counterspelling (if any).