Hi! I think that could be an awesome addition to the roster of the Kwaraz/Persian factions the units made for Caudillo87 of his submod of Stainless Steel: My new Komnenian/Khwaraz Unit Roster. Besides he has also several fantastic units for the Roman Empire. You can ask him if can let you to use his units. Here some examples:
Link: http://www.twcenter.net/forums/showt...az-Unit-Roster
Khalaj Horse Archers
Khalaj Cavalry
Daylami Heavy Infantry
Persian Nobles
On other hand I read that one of the reasons of that the mongols could conquest very quickly several of the principal cities of the Kwarazmian empire was because they had the very advanced chinese siegue weaponary at their service, which also used Hulagu Khan during the siegue of Bagdhad of 1258. So how you have a Yelü Dasy in your team maybe you can add some of his chinese siegue weaponary in the mongol roster. Here some examples:
Sijiao Catapults
The Hudun Pao (虎 蹲 砲) or "Crouching Tiger" Catapult, is a medium-sized catapult appearing first during the middle of the Tang dynasty. The Hudun Pao has a simple triangular frame and fires relatively light projectiles, the most common being explosive grenades to do wide area damage to the attacking army arrayed outside the city walls. It is a powerful catapult for its size, with its simple frame allowing for rapid deployment and yet being sturdy enough for a wide variety and range of projectiles.
This variant of the Hudun Pao is mounted with wheels. The stable triangular frame of this particular catapult lent itself readily to the addition of wheels. Traditionally Chinese catapults are sunk a few feet into the ground for stability.
As the Song are not used to besieging cities, the Hudun Pao is used defensively, usually firing against encamped enemy troops outside the city walls. The arched trajectory of the catapult made hitting troop concentrations or attacking artillery for maximum damage with exploding bombs or shrapnel-type projectiles more achievable.
Sangong Chuangzi Nu
The "Sangong Chuangzi Nu" or "Triple-bow Little Bed" arcuballista was the pinnacle of Chinese multiple bow evolution. Fitted with crosshaired "gun" sights and firing bolts metres long, these giant crossbows can devast nomad cavalry, helping defend the northern frontier against the increasingly powerful enemy. Special regiments of SanGong Chuangzi Nu teams called "Chuangzi Nu Shou" or literally "Little Bed Crossbow Hands", were formed in A.D. 1016.
The siege crossbow trigger was a direct derivative of the handheld crossbow trigger mechanism, scaled upwards in proportion to the draw weight of the bow. By ingenously mounting multiple crossbow arms on together onto a single frame allows these weapons a higher rate of fire, achieved by alternating the firing and loading of the arcuballistas or by doubling the number of bolts fired through having them armed and fired at the same time. The normal operating range of a multi-bow siege crossbow is over 500 yards. Up to a certain distance, the bolts were armour piercing; these weapons were much feared because of their penetrating power.
Meng Huo Yiu Ju
"Strong Fire Oil Spurter"
Gunpowder-impregnated fuses for flame-throwers were one of the first uses of gunpowder in warfare in China. The Pen Huo Qi, or continuous flame-thrower was invented ca. A.D. 919, after having acquired the knowledge of the 7th century Byzantine 'spurting' flamethrower. The invention of this continuous flame-thrower is possible because of the dual piston bellows/pump developed a millennia ago during the Han dynasty. A true flamethrower, it could project a continuous unbroken flame of naphtha when it was slow-match ignited with a low-nitrate gunpowder composition.
Whilst often mounted on walls as a defensive device this version is mobile and is used on the battlefield to harass and charge enemy troop positions, projecting a sheet of flame forward to shield advancing infantry following behind it.