Did you know before patch 4.20 Pantheon couldn't solo dragon?
On patch 4.19 with the updated summoners rift he couldn't solo because it had higher attack speed, now he can't block its attacks anymore because of his early cheese.
Why not just increase the attack peed again?
free dashes and then in the next patch made is scale to 0 instead of being free from the start. Unless you mean something like "going from A to B and then going back to A" instead of my example being sort of "A to B to C" (if that makes sense)