A fair warning, the rework below is pretty extreme and would very likely crash and burn in a real setting. Ekko's kit, while unique in that it allows him to provide massively powerful crowd control and utility as an assassin, is also loaded with many effects that achieve the same purpose (namely, Parallel Convergence's execution passive and Z-Drive Resonance's constant autoattack-dependent damage). Additionally, the presence of a shield on his W alongside its stun visually feels similarly redundant in certain situations (while clearing jungle camps or ganking, for example), and combined with his natural crowd control tends to foster less interesting bruiser builds. The editor for the concept below dislikes redundancy and tends to streamline kits and abilities to the extreme, and the result is a kit that would have far more pronounced strengths (better overall utility and crowd control) and weaknesses (damage that would be very hard to attain, even when landing abilities), though the result may make his damage needlessly difficult to reach. A goal on the side was also to streamline his mana management in view of a more difficult kit, as some of his mana cost scalings make little sense other than to constantly restrict his ability use (his E, for example, which gains little damage per rank, also costs 10 more mana to use when ranking it up).