It's a good thing you've replaced Demonic Tutor with something else, as it's banned in the format.

Have you considered Kolaghan's Command? I've found it to be very powerful in the format.

Did not know that demonic was banned, but thanks for pointing it out.
And yes I will test Kolaghan's Command, looks like a fun thing to have.

You can add the new Metallic Mimic, it let you keep the counters if it gets killed.

Also Taurean Mauler since it is a Goblin

Why don't you have Goblin Recruiter ? its flavor is pretty cool

also putting it together with Goblin Ringleader

other goblins

Siege-Gang Commander, Goblin Charbelcher, Skirk Drill Sergeant, Mogg War Marshal

Artifacts:

Herald’s Horn, Coat of Arms, Door of Destinies

enchantment:

Boggart Shenanigans

EdIT: For tiny leadersGoblin Recruiter, Skirk Drill Sergeant, Mogg War Marshal, Herald’s Horn and Boggart Shenanigans

me2tal : Goblin Recruiter is banned in tiny leaders. I already have Mogg War Marshal in my maybeboard so I'm planning to add it. Herald’s Horn seems like a nice thing, never seen it before, definitely going to add it.Skirk Drill Sergeant is also something to consider.
Also I think Goblin Bombardment performs better than Boggart Shenanigans.

sorry I am rather unfamiliar with tiny leaders currently.Herald’s Horn just came out in the new commander decks that is probably why.

Goblin Bombardment seems better in most cases - but why not both?