Sniper has low hp and low damage, and even his range isn't that good on lvl 1. So if he gets instantly zoned out, there isn't much he can do. But if you play too defensively against him, it's gonna cost you.
And Osiris: Lich is kinda of an hero who instantly wins a lane for you, no matter where he is. Even you if can't get much last hits, he is still going to pull the lane to your tower while stealing the exp from the enemy. Only problem he has is against heavy pusher heroes like Pugna, who is just gonna take down your tower if you pull the lane to it.