Magic, I need some advice Options

[Zaphod]

I have a rather large list of spells for two magic-casting characters, and here is the situation:

Since 2K3 doesn't have the ability to make a spell target one or all creatures at the player's option, you have to create two spells. For example, Fire targets one enemy, while Flame targets them all.

Now, the problem with this is that it practically doubles the size of the spell list for both healing-type and offensive-type magic. To allow characters to gain all of these spells, it requires earning new spells every three or four levels. That's a bit too many at the higher levels, especially if I want them to have their full spell arsenal by level 60 or so.

I see two ways of going about this--I can either say "Belgium with it" and let them gain the spells by leveling up, OR I can do it this way--the spells they learn by leveling up will only target one enemy, but they can find and/or purchase special skill scrolls which will teach them the spells that target all enemies. A third option would be the make the three levels of elemental spells that target one enemy, and then just one spell of that type that targets them all. For example, Fire1, Fire2, and Fire3 will each target one, but then there is the spell Flame which targets them all, and there is only one level of Flame.

So my question is--which is the recommended way to go about this?