am thinking there is some misconceptions about spellcasting. the angel and lich spellbooks are indeed powerful, and caster level does make a big difference in a few situations, but for a blaster, being level 30 as 'posed to 20 don't make much difference. your ability to hit touch ac is not gonna improve with 10 extra caster levels, and is so much gear for beating touch ac and sr that those hurdles is a non factor in any event. is a few blaster spells where dc's is important, but dc is also not based on caster level. caster attribute score and spell level is important for the would-be blaster. the gold dragon, now that is working, gives a charisma caster a big boost, transforms damage type to unresistible holy damage and ups the hd from what is typical d6 or d8 to d10, which am knowing don't seem like a huge factor until you do the math. is why those stacking 1-point-per die boosts from crossblood bloodlines or a few gear pieces is so devastating when added to hellfire rays and stormbolts n' such... though particular hellfire rays as you are talking endgame 45 hd worth o' damage.
as noted, am gonna eventual go lich/gold dragon. yeah, is tough to compete with a few o' the mindlessly spammable lich and angel spells, but am not thinking we handicap self too bad by going with the gd route.
HA! Good Fun!
ps our blaster main were a sorc azata. am not gonna suggest azata is best for blasters, but is more than good enough to be managing screen wiping displays o' pyrotechnics. we went cold, which were a mistake 'cause o' what we assume is a bug regarding dc boosting feats and gear not applying correct to the azata spellbook, but even as a human instead o' half-elf, and recognizing we didn't take best archetype for a blaster, we were screen clearing opposition with impunity. zippy magic is a big boost for a blaster. we went arcane trickster and were satisfied with the results.
but again, lich and angel is having many advantages o' blasters w/o needing work out the details o' a build or come up with a plan to take advantage o' capabilities. an angel oracle spamming storm of justice is not requiring schemes or plans or exploits. with storm of justice, enemies die... fast. entire screen o' enemies.
will be curious to see how builds perform with the dlc. inevitables and proteans is gonna be foes 'stead o' demons. holy damage shouldn't be effective against non evil, but holy and unholy damage doesn't behave as one would expect in wotr.
pps we mention proteans 'cause when we recent checked to see how many steam players had managed the secret of secrets quest, we saw the thumbnails for the new dlc achievements, and the "glimpse of truth" achievement sure has the semblance o' a pathfinder protean.