Hi Riot. I think Ghost might be an underpowered Summoner Spell that could use an invert of its ramp-up effect to make it more attractive as a mobility option. Instead of ramping up, if Ghost gave a burst of movement speed at the beginning, I think it would rival Flash in terms of usefulness.
Making ghost any powerful will just make Darius even more of a menace and personally, I'd rather not deal with juggernauts that get a mini righteous glory as a summoner spell.
Any changes that aren't direct nerfs only make darius more frustrating to deal with.
The summoner is barely used outside of cheesing and should probably be removed/reworked.
for burst movement speed you have: 
and or champions with movement speed kits.
The thing is, ghost is already fairly overpowered. The primary issue is just that flash is obscenely overpowered and cannot be nerfed to a reasonable state that is fun and useful, and its too late in the games life cycle to remove flash.
Also, after ghost was super buffed a few years back, it was all up front, no ramp. But it made hecarim and post rework WW too strong.
