Replies...
Scharlata
That is correct, damage is only done when there is a successful hit.
Saeviomagy
Fire shield is a spell that a the caster can only cast on himself which in turn does protect the caster...Additionally, attacking from range is not a far superior tactic if you have a much more potent melee weapon. Combats essentially come down to who can deal the most amount of damage in the least amount of time. The one exception is that you'll run if you realize that your damage output (and those of your allies) does not match your opponents.
Just for the record, after realizing that fire shield is personal only and hence can only be casted on the caster himself this spell makes a lot more sense. It protects the caster and nine times out of ten it will be a wizard that can't take a bunch of melee attacks from big damage dealers. Up till now our whole group has misread it and have allowed it to be casted on others. As for mass and legions versions I really see no need for this and actually think it may be a mistake on the designers part. First, as many people have pointed mass versions are usually several levels higher than the single person casting of it. Mass Fire Shield isn't. Secondly, and this is a biggie to me, how can you have a mass or legions version of a spell that can only target the caster? After flipping through the PHB, MHB, CA, CD and so on and looking at mass spells they are spells that allow you to cast the single person version on other people. The two exceptions to this rule are Legions Fire Shield (and mass fire shield but it is essentially the same spell) and Legions Shield of Faith. These two spells make me believe they were poorly designed and don't make much sense. Has anyone else noticed this discrepency?