The only update I can offer is that taking StencylForge offline, combined with some server tuning, has dramatically improved the site's stability. Unfortunately, this suggests that StencylForge is a huge reason why the site was going down so much (why this is is still being looked at), and going forward, we'll need to make some changes to combat that.
Again, I ask for your patience and understanding in this. Nobody wants a site down half the time, and as we discover more, StencylForge will inevitably require further work bring it under control.