I have tried both and while Judge's Insight seems to do more damage it does drain my energy alot since I need to recast it every 13 or so seconds.
On the other side Conjure Frost (I use icy bowstring) doesnt seem to deal as much damage (but not much less either) and costs way less energy and you dont need to worry about it often because it lasts 1 minute.
I probably would go with Conjure however I would be stuck with Resurrection Signet, I can't imageine playing without rebirth

What do you guys recommend?