[Wrana]

Firstly, the appearance of Russian folklore-based faction is certainly fun. Especially for those who know that there very few sources on this folklore, and those that exist are usually from later periods. I was certainly very pleased by Simargl (accidentally, it WAS sometimes depicted armed with scimitar!) and various lady birds!
However, some other things give impression that it's really a project for 2 (or more) factions from a different time periods. For example, Druzhina cavalry is certainly from a "heroic Age" (historically, it existed in 10th-14th centuries, and in legends it is mostly related to Knyaz Vladimir Krasnoe Solnyshko ("The Red Sun") - a character based on rulers of 10th - Vladimir Svyatoslavitch and 12th - Vladimir Monomach - centuries), while sectants such as Khlysts appeared after 17th century (accidentally, Skoptzy was quite another subsect, while the most famous Khlyst was Grigorij Rasputin - "lover of a Russian Queen", and also hypnotist and faith healer!) and never worked for church or state establishment (some sects even were pacifistic). So these should be features of different factions/ages (or sectant be heretics but this would be somewhat too powerful for stealthy troops). As for mages - historically Volkhvs and Znakhars were depicted as Nature-oriented.
I may try to make a mod on this theme, but in late age it may become too similar to late-age Avalon, and such duplication isn't much fun...