Okay, so say that your DM allows you to take Blind as the equivalent of two Flaws. The
Blinded condition is no joke: AC penalties, skill penalties, half speed, everyone has total concealment.
So let's drop one of our extra feats on
Blind-Fight. That gives a human a 20-foot move speed, which is manageable, gives you back Dex to AC, and lets you re-roll the concealment miss chance. You're stuck with the -2 to AC, though, unless I'm missing something about the +2 to attacks for being invisible and the -2 to AC for being blind.
Class options: Clerics could be very effective noncombatant buffers and healers, but that's for chumps. I wanna do the whole Daredevil thing and do some violence that I can't see. Psions get Synesthesia, which is handy. An arcane caster could do the traditional Mindbender->Mindsight dip, but might still walk into walls and mindless enemies. Scoring a familiar or animal companion would be handy.