If you want increace top lane impact,why not try to connect top lane and bottom lane in some case?
For example, add a crystal on each recessed wall in top lane and bottom lane. The crystal will charge those nearby champion.When a champion's charge fully,they can use all charge to teleport by a crystal to another one.The charge would not decay,it up to maxium need about 1 min (or 40 sec,there place are dangerous after all) .
Let me clarify it , it's NOT BUFF the top lane ,just make them take more participate in game. There are several reasons 1 . Please notice that not only top lane can use this teleport, jungler,the two player in bottom lane can also use . 2. Look https://www.qzjlw.com.cn/uploads/images/xiaz/2019/1122/1574385157446.jpg
https://www.qzjlw.com.cn/uploads/images/xiaz/2019/1122/1574385157574.jpg
Obviously,there place is dangerous,if you want to use cyrstal teleport you need standing there total for a long time.This mean only you have enough advantage can you use it to support other lane.