With all the artifact hate in t1 and goblin welders pumping moriok rigger to lethal can happen very quickly. Can a t1 deck be builty around it with shamans, vandals, welders, and riggers?
For everyone's info:
Moriok Rigger - 2B
Creature - Human Rogue
Whenever an artifact is put into a graveyard from play, you may put a +1/+1 counter on Moriok Rigger.
2/2
54/165
Rare
About the proposition:
There's absolutely no need whatsoever- it's a win more card if I've ever seen one and it requires a reliable black source really early on (which means fetching Sea in a deck that needs to be fetching Volcanic on that turn).
The above comment of course refers to the suggestion of an "engine" with Welder recursion for counters. Your other idea, of Vandals and Shamans to destroy your opponent's artifacts and gain counters at the same time also prevents the riggers as a superflous piece- they (your opponent) have to keep playing artifacts for you to destroy, and if you're that far you are in a winning position anyhow.
It seems like this card was printed as hate (albeit mediocre at best) for Ravager in T2? I doubt it will see play in T1.