That's like saying let's have the HRE conquer Normandy and Aquitaine, but f**k France!
Well, much of India isn't particularly pleasent to massive calvary armies, which, I would assume, is what would comprise the majority of an army made up of nomads from the steppes. Also, there are the mountains there, which might give India some more leeway, I'd suspect.
Even so, though, this just seems a bit wrong. Steppe Empires haven't been uncommon in history, and they usually cause a huge mess when they show up, such as the Magyars and the Huns (I'm not going to include the Turks in there, because their rule over Central Asia and Iran was a pretty well managed Empire! Although their states in Anatolia were certainly weaker.). But, the thought of one getting that big, and being able to last for several generations just seems a bit out there, to me.
Its interesting you have this Mongol Empire stopping before it reaches much of Europe, though; I wonder why? The Rhomans were actually rebuilding themselves at this point, so I could certainly see them stopping a *Mongol advance, but the Poles and Magyars? I mean, I'm part Polish, and have a lot of respect for the Polish Kingdom, but in the early 13th century? I think not.
On a side note; could we please get through an entire day on this board without someone harping on with Sino-propaganda!? The Chinese colonization of England, really? It was an occupation in the mid-20th century; it wasn't colonization, and it never would have flown if the Germans, New England and Rhomans hadn't lent support. I think we can have a nice frank conversation about the outcome of the Great War, without going down this path.