I quite like this hero, so I'll probably try to find a way to make him usable. Noble Phantasms are his whole thing and Rider is the Noble Phantasm class, plus they're all in his legend and some of the lower ones like flying, disguise, and minimap are more or less on par with high-level magecraft. One thing I could do is fold them all into one phantasm like King's Order if that would made it look better but aside from that I could cut the Medusa's head (just something I added because it was mentioned in a FGO materials book) and preservation ability from the sack and nerf Harpe so the anti-heal wears off after a while, basically just putting someone out of commission for the rest of the night if he lands a good hit.

If I end up having to switch characters I'll probably have to change classes too since few other Riders appeal to me.