I think that summoning spells should be very short rituals 2 or 3 combat rounds at most with concentration (endurance checks) if hte caster takes damage. As spells they could quickly skew a fight and would be difficult to balance.
Or at least the scroll version should be doable in battle. More incentive to do rituals and it allows stuff like you would see on shows like Buffy or Charmed.
Or at least the scroll version should be doable in battle. More incentive to do rituals and it allows stuff like you would see on shows like Buffy or Charmed.