I applaud you for the Path to Exile + Archive Trap combo. I hadn't thought of that one. I'm going to have to steal it :P

Have you considered Hedron Crab? I know you said you didn't want to use creatures, but I find that this is a really good 1 drop and works rather well with the fetch lands. And it repeatedly mills your opponent, rather than just having a one time use.

Also, I would like to know your opinion on Mind Funeral. I often find that there isn't enough milling happening when compared to Glimpse the Unthinkable. Two mana for 10 cards is a bit better than what I average with Mind Funeral, which has lead me to include Breaking instead. Slightly worse than Glimpse, but is one less mana than Mind Funeral and the average amount of cards I see milled from that is ~8 anyway.

My last suggestion would be -Memoricide +Card:Sadistic sacrament. I'm having a hard time convincing myself that this is the right move though. I mean, it's less mana, but more heavily reliant on having 3 lands that can produce . And doesn't search your opponents hand. But it does allow you to view their whole deck. And sometimes you can get rid of more than one of their finishers because not everyone runs a full playset of them.