Goodday i wanna share a gameplay on ekko that i like the most, with this build u can still be a assassin that does enough damage but also give u the point to be a fighter, because give ekko AS and your passive will stack quicker so u can attack every 3 second on the enemy and make sure its damaged, with nashors tooth u also gain more autoatk from the passive that gives your autoatk 15% AP. but with that u cant go full AP u also need to be defensless or else u die quicker. The reason i teake this build is because most AP fighters does alot of burst damage but haves a high CDR that makes its squishy, and with this u can keep fighting as long as u want without to be consurn that your damage only comes from your abilitys. I hope it was helpfull and see u in the battlefield.