It looks like you attempted to merge a Madness deck with TnT. While it might make for some interesting plays, I think you've basically ended up with a deck that is weaker then either archtype by itself.
Bazaars + Workshop : These cards are very difficult to run together in the same deck. Unless you plan on forgoing all but the lightest splash of colors you will be looking at a slow mana development which basically means you are going to end up with a stompy deck that is all too slow.
Welders + Madness : By incorporating madness creatures, you have diluted the use for your Welders and stretched the manabase even farther.
So basically, I think you need to pick a particular strategy and enhance upon that -- Madness, or TnT. If you insistant upon trying a Bazaar+Workshop deck, I would forgo madness and attempt something mono-artifact with a splash of red for Welder and maybe a [card]Gamble[/card] or two
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