[Gamemode concept] Artillery Barrage

Spell ranges, autoattack ranges, item active ranges, and aura ranges are doubled. Spell sizes themselves remain the same (ex. Brand W is same AOE but has twice the casting range). Everyone gets a permanent 50% MS buff if enemy champions have vision of you, starts the game with 45% CDR, and hitting a spell on an enemy champion restores 20% missing mana.

The game would be played on a variant of the ARAM map that's wider and has no brushes. Only the following champions are allowed:

The game is won when one side aces the other. Minions are a thing, but they exist to be meatshields for enemy skillshots and are automatically smitten if they venture too far into the enemies' side of the map. No turrets, inhibs, or nexuses.