I've had a DBA LAP army for some years, and finished a DBM version early in 2002. Not a very strong army, but with interesting history. This army was the primary opponent for Alexander the Great - the Persian king Darius III lost at both Issos and Gaugamela, much because of his own premature flight on both occasions.
Follow this link to Achaemenid Persian DBA.
I mostly use the army for refights and have not found a "standard" list I'm happy with. You can make a list that has enough Lh to out-skirmish most opponents, and still attack with at least one group of Sp and another of Ps-supported Ax. You have a huge (12 elements) minimum of overpriced Cv(I), though, and a shortage of heavy-hitting troops.
For one of our Gaugamela refights, see Gaugamela at MiniCon2003.
Link to pages containing specific elements:
| Amrtaka (the famous Immortals) |  Huvaka - the King's relatives  |  Arstibara - the King's Applebearers  |  Kardaka - the troops of the Royal Household(?) |  The Persian National Cavalry |  Colonist cavalry |  Takabara |
The Later Achaemenid Persian army. In front a group of post-Amrtaka with Ps, Ax and Cv. Behind them from left to right a large group of colonist cavalry backed up by Takabara and light infantry of various nationalities. Then spear-armed Kardaka with the Persian National Cavalry, under the personal command of the King of Kings in his chariot, behind their right flank. More colonist cavalry are behind their left flank. The Kardaka's left flank is covered by Massagetae and similar heavy cavalry, mixed in with Huvaka Kinsmen cavalry rearmed with lances.
The above army seen from their left flank. Note at the right of the picture the Cv sub-general is flying the "King's Fortune" banner and receiving a messenger from the blue regiment of Amrtaka.
I've used "The Persian Army 560-330BC" by Nick Sekunda in preference to other sources. I don't really think it is that accurate, but it was the only source available to me that gave me a total framework to understand the army in, and its description was easily morphed to fit the DBM army lists. I've also partly gone by D. Head's "Armies of the Macedonian and Punic Wars", "Alexander the Great - His armies and campaigns 334-323BC" by Nick Sekunda and John Warry, "The Greek and Persian wars 500-323" by Jack Cassin-Scott and some other books (including the primary sources).