Saeviomagy said:Note that there are a lot of situations where 1d6/level to lots of creatures is inferior to 1d6/level to 1 creature, simply because those extra creatures are your compatriots...
True, but you can minimize these situations with various abilities to sculpt spells, or spells with improved targetting (eg. flamebrand) etc. However if you're playing to the strengths of an arcane caster it seems to me the best way to go is area affecting damage spells vs lots of targets or save or die/be disabled/be horribly disadvantaged type spells for single targets. Or preferably the latter without save, but those aren't as common

With the exception of maybe disintegrate and meteor swarm, I find that arcane casters don't have as high a damage potential vs single targets as melee types do.