Two scoops.

Yeah, that was a big problem with fluid magic.

8 berries each might be too convenient. Basically, it comes down to this: I'd hate NPCs to have 8 berries each.

Maybe you can make a somewhat different healing spell for 3rd. Or, have the spell last a day and you can use raisins instead of fresh berries. Goodraisins. You could keep say, two scoops of raisins in your pack for a long time. Burn the spell, everyone gets healing raisins for that day.

BTW Steve, your didfactory invite is in your gmail account.