This build attempts to blend sorcery and swordsmanship into one complete package. It has solid offense and defense, and enough versatility to take on pretty much anything. Generally speaking, this is a melee build, but if it runs into a foe with high end melee defense it is a capable spellcaster.
Sorcerer 6/swiftblade 10/fighter 4/eldritch knight 10
Drow
Stats:
str 17 +7 (levelups)
dex 13
con 10
int 14
wis 10
cha 16
1 fighter — LOH, dodge
2 Sorc
3 Sorc — still spell
4 sorc
5 sorc
6 sorc — mobility
7 sorc
8 SB
9 SB — extend spell
10 SB
11 SB
12 SB — blind fight
13 SB
14 SB
15 EK — maximize spell
16 EK
17 EK
18 SB — practiced spellcaster: sorcerer
19 EK
20 EK
21 EK — quicken spell
22 EK
23 SB - kd
24 EK
25 EK - automatic still spell I
26 EK
27 SB - automatic still spell II
28 Fighter - IKD
29 Fighter- automatic still spell III
30 Fighter - Epic prowess *or* armor skin
The build, as listed, is designed for at least a cha item of +3 or better to alloow it to cast lvl 9 spells. It has 25 caster levels vs dispell magic, and as such is all but immune to greater dispel and only vulnerable to a mords when it comes to dispelling. Even dispelled it has 50% concealment, haste, and freedom for 150 rounds per casting of extended haste (and as a sorcerer it has an LOT of castings of haste per day).
The saves are nothing special: the build relies on multiple spell mantles to survive vs casters. with quicken spell and least, lesser, regular and greater spell mantle it can cast a mantle in any slot from lvl 4+ and cast 12 quickened mantles per day. Superior resistance or greater resistance + 20 or more spellcraft helps to shore up the saves at least a tad. I considered a version that used paladin instead of fighter, and it would be viable that way as well.
For spells I go with mostly buffs, the only real offense needed is ray of enfeeble, bigbies forceful, and igms (tweak as necessary based on the mod/setting at hand, though). A nice spell for rolling through lowbie/effortless foes is firebrand. key buffs include (lesser) mind blank, shades, shadow shield (although that is a tough pill to swallow given the other awesome spells at that level), haste, mirror image. There are lotsa other nice buffs but hey, do whatcha like!
When in doubt a maximized ray of enfeeblement + bigbies forceful will incapacitate the enemy and from there it's gg! super damage resistant/high ac foes can be igms'd to death if need be. On the defense from an extended haste + maximized mirror image + premonition makes you basically immune to melee damage.
Skill points: just needs max concentration, 30 tumble, 20+ spellcraft, and the rest as you please (umd is always good, taunt works for the build as well).
Full plate and tower shield, it has no weapon focus so it uses whatever it finds/likes and can bust out a tower shield if need be.
bab = 27
ac is respectable thanks to swifblade bonus and access to tumble.
Overall a very fun and versatile build!
p.s. another variant would be to go dex based and replace still spell with 2 weapon fighting :)