Short version: Do melee spell attacks take into account armor when the range is Touch?
Longer version: Assuming a prepare an Inflict Wounds (PHB253) spell, that has the following properties:
- Range: Touch
- Description: Make a melee spell attack against a creature you can reach. On a hit [..]
Assuming that the opponent that I choose as a target has a total 15AC:
- 10 Base
- 3 Armor (possibly natural armor)
- 2 Dexterity
What should my attack roll be to successfully hit? 15 (the whole above) or 12 (since just touching, armor offers no protection)?