Coredump,
Here's how my
TMC list works. It's posted here:
http://www.dakkadakka.com/dakkaforum/posts/list/205341.page
You form a gunwall. Every
TMC in base contact with the next. Try not to be be in cover, you don't need to be.
Your gunwall provides cover to the genestealers behind them.
Since you are most effective at 18" range, you can dominate the center of the board, and at the end of the game split your wall unleashing the stealers...and moving
MC's as necessary to take quarters.
Scuttlers on stealers is a different type of list. In that case you are simply trying to rush ahead and slaughter your enemies ground troops. Works great until you run into a pure mechanized list, then it's not so good.
I've run both, the
TMC list is simply better all around vs more comers than the stealer shock list is. Just my experiences with them.