This has probably been posted before, but I was just looking at Simulacrum and noticed that the Pathfinder version doesn't require any hair/blood/whatever from the creature, just an ice sculpture of it. So now even without cheesing around components, you can make one of (at least) any creature you know the appearance of, or that you know anyone who knows the appearance of.
Also, Simulacrum is a 5th level spell for Summoners. Which makes a self-growing Simulacrum army possible without extrapolating hypothetical 26th level casters to copy.
1) Staff of Simulacrum (10 charges) and Detect Magic (1 charge), CL 10th. 28.5K gp.
2) The staff's "target" is a 20th level Sorcerer, therefore creating a 10th level Sorcerer simulacrum.
3) The simulacrum can recharge and use the staff, generating another copy every ten days.
When you get enough money, upgrade the staff to make copies faster.
Edit: Also, since crafting doesn't cost XP, and is much less reliant on knowing specific spells, Simulacra can do that for you also.