I would consider the most underrated lock piece available to Workshops right now, Rishadan Port.
I love ports, I run 2 of them in my build =D
the fact that Goblin Welder is not an actual threat
Agree with you on this, I always hate when my opening hand's best plays are like Crucible and Welder
You guys are right on the point that you get mana screwed sometimes with red, I always end up using Bazaar to dig for what I need though. I'm guessing MUD would be way more consistent in that aspect. A turn 1 Hellkite or Karn would be way more threatening than a Turn 1 Welder...