Skimmed it a little.
@Therigar: I have a 142/131/127 cannith crafter as my main.
You CANNOT craft a +5 Holly Repeating Heavy Crossbow Icy Burst Frost Blast with Cannith crafting. CC DOES NOT DO THAT. You CANNOT craft something remotely comperable to greensteel and even if you could, it would be ML20, not ML12. You're comparing apples and sparkplugs here. You might be able to make a decent DR-breaker, but it won't be as effective as greensteel. I haven't even run the shroud and I know that.
I did craft a lovely Holy Burst/Greater Evil Outsider Bane repeater for shroud. Should be effective.