the graboid/shrieker rush deck also works great against top 50
I use http://elementscommunity.org/forum/index.php/topic,6298.0.html (http://elementscommunity.org/forum/index.php/topic,6298.0.html) for AI3's, and SG's post assures its good for T50's. Before, i had a mono-dark that did pretty well against them.