Glitterdust and web are cool, but they're utility spells. I usually end up picking at least one of them for my casters, but neither one can really be considered a "blaster" spell.
For 2nd level, people have already mentioned flaming sphere. On paper, that's 12d6 damage, but it's spread out over four rounds and allows four saves to negate it. There's theoretically damage output, but usually... I prefer to go for the sure thing. I won't lie, I'm actually picking up flaming sphere for my wizard in Pathfinder Society next week. But my first choice for an awesome 2nd-level spell...
I have to go with summon swarm.
A spider swarm does 1d6 damage automatically. Sure, it's only 1d6, but you also get poison and distraction. I personally think that it's sort of awesome to get both automatic damage and a control effect in one spell, especially if your targets don't have recourse to area effect spells.
It's even better if you can cast invisibility beforehand (you can summon monster all you want without breaking invisibility).
For 2nd level, people have already mentioned flaming sphere. On paper, that's 12d6 damage, but it's spread out over four rounds and allows four saves to negate it. There's theoretically damage output, but usually... I prefer to go for the sure thing. I won't lie, I'm actually picking up flaming sphere for my wizard in Pathfinder Society next week. But my first choice for an awesome 2nd-level spell...
I have to go with summon swarm.
A spider swarm does 1d6 damage automatically. Sure, it's only 1d6, but you also get poison and distraction. I personally think that it's sort of awesome to get both automatic damage and a control effect in one spell, especially if your targets don't have recourse to area effect spells.
It's even better if you can cast invisibility beforehand (you can summon monster all you want without breaking invisibility).