Does the damage boost you get on weapons from upgrading them add to spell damage (I'd assume so) and healing amount (not so sure about this one)?
Also, is there some handy formula for seeing when it's good to use a lower star weapon over a higher star one because it has a higher damage multiplier? For example, you have a weapon that has 50 base damage and a 1.10x multiplier and another weapon with 30 base damage and a 1.20x multiplier. Which is better? And let's say that the multiplier DOES affect healing amount, I guess that would be all that matters, rather than base damage? I hope that makes sense.