How would you introduce mana points for spellcasters? HP cost for spellcasting It’s an elegant rule, but some players would find it extreme especially at low levels PC.

So, maybe I could introduce magic points.
But how to implement it with a simple house rule?
1) Max mana points are the same of your current HPs.
When spellcasting, you subtract the spell cost from mana.
When damaged, if your current mana is greater than your HPs, the damage taken affects both. Mana points are recovered by resting only.
2) Max mana points are half your current HPs.
When spellcasting, you subtract the spell cost from mana.
Damage does not affect your mana.

Which could be better? Other ideas?

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