Gangplank
Your "buff" to his ult was actually a massive nerf. I don't know what you're thinking . . . but, having his ult do 145 damage ((aka after resistances like, maybe 70)) every 1 to 1.5 seconds is absurd. At least when it was random, there was a chance all the cannonballs would land in one specific area and it'd do all the ults damage quick enough to actually matter. Now, it's this . . . ridiculously slow pewpew that a 300 health sona can walk across and survive. Yeah, that's right, a 300 health sona can walk from one end of the ult to the other, and live. Because it's only going to hit her one time. I even got bored enough to do an ap GP just to see how much damage potential it has. I only killed one person with the ult, and that was someone who had like 10 hp running away. That's it. Case in point: Unless you make the cannon balls come down faster than currently, there's absolutely no reason to pick GP over anyone else. There are far better aoe slow champions with far lower cool downs, and there are better champions that do aoe damage faster. Whether it be top, or jungle. He doesn't really have a niche . . .
....those one shots are fantastic. "Oh look, it's Lulu... PARLLLLEEEY!!!