NJClaw
OoOoOoOoOoh
You can't be serious.It's a multi-hit attack, it's obviously logically inconsistent if one multi-hit attack procs sneak attack multiple time while another doesn't.
Even in PnP, Magic Missile gets no Sneak Attack, while Scorching Ray does.
To get the Sneak Attack damage, the spell needs to have an attack roll. Magic Missile doesn't have an attack roll, so it normally gets no Sneak Attack damage. The only way Magic Missile can benefit from Sneak Attack is through Surprise Spell, but that doesn't change the fact that Magic Missile makes no attack rolls, so it only counts as a single spell and gets the damage bonus only once.
Of course Fireball adds Sneak Attack damage only once per target... because it doesn't make multiple attack rolls!It's a different ability...
Which means what? That hitting twice with a spell that sneak attacks in one instance should do double damage while another should only do damage once? Bear in mind that if you cast something like Fireball it also works correctly and sneak attacks once per target.
The only inconsistency is with spells that have two damage types (stuff like Volcanic Storm), where it doesn't really make sense for the Sneak Attack to be applied twice.