They are faster and have better morale than Saracens and with the irresistable charge bonus they can be quite effective against even sword infantry, but really flanking is their speciality I think. The unit of 60 isnt big enough to fight big units of cavalry as the size of the unit can cause it to be surrounded quicker and thus routed, Saracens and Muwahids together can be the best spear partnership in the game easy.
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