Since Khans DLC, the recruitment conditions for Horse Archers was changed slightly in vanilla, horse archer code has been changed to match.

Viking Raiders have been given the "requires to be patron of holy order to recruit" requirement like other faith-based MAAs in 1066+ starts otherwise every AI Asatru would not stop hiring them.

Viking Raiders have been buffed slightly in exchange (extra damage/toughness and archer counter was raised to 1 from 0.5)

Qiangic, Mundhum, and Kirati faiths have been given Mountaineers (due to their association with the indingenous people living in mountainous regions and Himalayas - at least according to half-baked research) and Taoists have been given Chu-ko-nus.

Forgot to add north_african_religion