I've done first version of the dervish, and have looked around at sword-wielding cavalry. I'll probably model the pose after Tien Chi/Jomon cavalry leaders holding sword up. I'm not sure if I'll draw the sword myself or edit something like EA C'tis lizard chariots' huge falchion.
I still don't have any ideas about drawing Dervish cavalry with two swords. Would it be possible to give some less-used cavalry lances or light lances? Dervish cavalry with lance/sword/hoof would still work well as shock troops. I'd also like to give the mounted scouts a light lance.
I'm much more confident about the camel problem now that I realized I can model it after 'wasteland survival' symbol.