Does experience gain from damaging Restoration Spells depend on damage dealt?
Solution 1:
Based on what I can find in the Skyrim:Leveling - Skill XP UESP wiki article, it doesn't seem like spell damage matters.
Restoration skill - sources of XP/Notes:
- 1 base XP damage healed by healing spells.
- 1 base XP per Magicka used on non-healing spells.
- Additional multipliers may apply.
Although this might be slightly dated. Bane of the Undead also deals damage, but indirectly and is in the base game.
Through this, I am fairly certain that damage doesn't matter for Restoration.