I'm not really sure how does this list win, and that's pretty important. It does not seem to go for a quick win, like old times, but a kind of soft control with those silver bullets.
-Goblin Recruiter is awesome with earwig and ringleader. It's kind of a 5th matron, does not give the card to your hand but is cheaper and can fetch more goblins.
-Kiki jiki improves that soft control, duplicating effects each turn. Slow, but really powerful, and comboes with Lightning Crafter, another fine goblin when expecting mentors.
-Bloodmark Mentor is a bad card, but if you expect tokens and aggro could work. Legion Loyalist is another version, cheaper but only works if you have several attacking goblins. But I'd play them only in more aggro versions.
-Krenko should be bad now with all that tokens' hate. If nobody plays illness in the ranks or virulent plague, could be ok.