Why do you even bother putting AP scaling on Leona's moves

If your answer to her doing too much damage is to decrease her ability damage when no one was building AP on her in the first place, she becomes even more forced into a single item build. Her excessive damage was coming from her staying alive long enough to melt people like she is amumu. I would really enjoy the potential to build literally anything on her other than relic shield, zeke's and/or the tabi/bramble/bami trifecta