What about Gauntlet of Might and Gauntlet of Power ? Also Nobilis of War is nice if you wanna boost them some more (provided they attack)

Can you have Nobilis of War, since it has hybrid white mana?

Also worth considering are Mogg Infestation , Ib Halfheart, Goblin Tactician , Goblin Warrens , and Goblin Scouts . Oh, and Goblin Assault but it may get all your goblins killed

oh...no you can have the Nobilis, my bad. I made that mistake in my EDH deck too

Run Thopter Assembly .

Also, I don't know if this worth the slots, but you could try some 0 CMC creatures like Kobolds of Kher Keep , Memnite , Crookshank Kobolds , Crimson Kobolds . They work well with Skullclamp and two of them can go infinite with Cloudstone Curio .

Done. Nice card. Thank you! Keep them coming.

The Kobolds probably don't fit in because of the limited use (one creature).

There are plenty of cards worth at least looking at in the Purphoros deck I built so that I could give people card suggestions in the form of a deck list: God Of Department C4.

Remove Obliterate, Decree of Annihilation.

Chain reaction maybe?

I play purphoros myself, but more like a goblin tribal deck, without the expensive big creatures and spells.

I would suggest Goblin Welder and Daretti, Scrap Savant to get stuff like Myr Battlesphere, Wurmcoil Engine and Memory Jar out of the graveyard repeatedly. This probably requires more artifacts in general, mana artifacts for example. Panharmonicon is also great in this deck.

Thanks Winterblast - I'll have a go at using Daretti and Wurmcoil in a couple of games! Panharmonicon I agree is a great card, it's been in my deck since I discovered it the other day.