My first crack at a stonescar aggro deck after the new set.
The big decision point I had was whether to include a market at all, but I did end up going with
Caravan Delivery over Catalyze which was originally in that slot.
Other thoughts: Nico is kind of in here as incidental value. They're a playable 2 and there are a handful of frenzy triggers in the relic weapons. I don't know if there's a better 2 but I think that's what I'd want in that slot otherwise.
Update: swapped back to catalyze, and added Katrina to the main deck over a weapon which was difficult to play on curve, and which didn't kill major threats..
1. I disagree with some of your unit choices. I don't love a card like Ascetic Lantern where it doesn't establish board presence (although it is good in more combo-y decks). I like Bloodseeker instead, as it is more beefy and actually has a good chance of getting bigger with hunt.
2. Two possible two drops to replace Nico: Grove Supplier and Twilight Lantern. I particularly recommend the Supplier, as getting +1 attack on all of your units is pretty amazing for a 2 drop.
3. I would definitely put some kind of Power in your market - either a Sigil or something with Inscribe.
Good luck!