Stealing Creation can be fun in short bursts. Well worth doing for the hammers for smithing and construction at the very least to keep costs down. I've never tested the efficiency of the knives yet because fletching is already pretty cheap and I haven't really trained it seriously for 5 years, but I can see the advantage when going for a big amount of XP in a short amount of time like SKOTM if you already had the points.
World 99 "fast sc" is another decent non-combat SC group, but their games aren't usually down to 10 minutes. In my file, I've got them at an average of 14 minutes a game including the waiting time for initiating the next game. Works out to 4.9 tools an hour with usually getting 23 points a game. I'll have to try 1elitesc.