Don't worry. I realise these are just generic RPG ideas. I do that all the time! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
The only problem I see with that skill system is that you'll only ever do the same thing because that's all you're good at. Look at Dungeon Siege! Far too limited in my opinion.
A skill system should open up new posibilities. By studying math at primary school, you can attempt science subjects at secondary school. Those science subjects then allow you to learn engineering or biology or computer science at University.
Now if your skill system had a range of skills that had minimum requirements, this could be more interesting:
Lightning Strike: Call lightning from the heavens. Average mana cost. Requires level 3 Lightning Bolt and level 1 Cold Bolt. Additional levels in Lightning Strike require another level in both base skills.
Flaming Sword: Adds fire damage to Sword attacks. Small mana cost. Requires level 3 Sword Expertise and level 2 Fire Bolt. Additional levels in Flaming Sword require another level in both base skills.
Not only does this encourage using multiple skills, but, in the case of Flaming Sword skills of different "classes" as well.
