How exactly are you doing the KotH concept? Depending on the precise way you want this to work it might not be all that hard. My very first map had a KotH type concept - there was an island expo in the center of the map which one side had to seize and hold for 20 consecutive minutes to win the game. If I wanted to have multiple hills in that scenario, that could be done a few ways. For example let's say I wanted the player to have to have a base on -all- the hills to win, not just one. I would add a condition to the trigger specifying that the countdown wouldn't start until all the hills were held by one player. But to try to offer much help though I'd have to know what exactly you want the map to do/be like.