Minions for a Rogue Boss

[Dreikaiserbund]

Pretty much what it says on the tin. The PCs are going to be fighting a rogue-like boss monster in the near future. Since 1 vs. Many fights do not end well, I need some minions -- and so I turn to the forums for advice.

The party is level 13, larger than average (between PCs and cohorts we're looking at about 8 characters), and pretty highly optimized. They've taken on CR 18+ encounters without too much trouble.

Other notes:

• The minions should be capable of actually threatening the PCs or otherwise drawing fire/attention.
  
• The two PC 'pointmen' (PoW martials) have ACs in the high 30s, most everyone else has an AC of 20 or so.
  
• Ideally, the minions should in some fashion synergize with the rogue boss -- he specializes in ranged sneak attacks and poisons, so something that blinds or flat-foots characters, or something that lowers saves would be ideal.
  
• Minions should be compact -- medium sized or smaller ideally.

Past that, anything goes. I'm perfectly willing to repaint outsiders, undead, what have you.

Suggestions?

[Scrapper]

A few Rogue/Caster mix with Range Touch-Attack spells is a must for any organization for dealing with heavy armored intruders, back up with a few that deal with the usual snooping (and some times magically enhanced) investigator types, then your generic Fighter/Rogue and Ranger/Rogue brute squad mix. Maybe add in a Cleric if the Boss is a faithful follower of some Roguish Deity, but that should be set up well in advance, with hints such as certain artifacts stolen from a museum while on tour, odd items of worship uncovered in smuggled contraband, ect...
With a party of Eight, I'd guess at 12-15 minions plus Boss for final fight, which seems to be a lot and would likely bog down in combat. Also, Half should be lvls 5-8 so they can contribute with out being taken out in one shot.
For Idea's on some NPC's check the Game Masters Guide and NPC Codex, plus Villain Codex if it's available. Add in Inner Sea Gods if you want to add in worship and a shrine/temple, that would be a nice connection to some super natural encounters.

Poison and Ambush sounds perfect for adding a few Drow associates...