I'm thinking of cutting some of the cheaper/not so great creatures that Kaalia can sneak in for a Stoneforge Mystic and some equipments that can protect Kaalia from spot removal (my opponents are constantly shuffling her into my library >.>).

I love Kaalia of the Vast so much so I bought and modded the Heavenly Inferno deck too. Here is a link to mine -- deck:heavenly-inferno-of-death.

If you want to put in an equipment tutor, I would say use Stonehewer Giant . He equips for free, and can tutor more than once. Pretty sweet. Thanks for the ideas from yours, and feel free to check out mine for any cards you like. +1 for Kaalia!

Also card:Steelshaper's Gift. Although subtype specific tutor has its limitations, perhaps Beseech the Queen , Demonic Collusion , or any other black tutors. It is just great that all these Heavenly Inferno variations are popping up.

Elspeth, Knight-Errant might not be to bad keep attention off of you can make chump blockers or she can pump your creatures, then if you go ultimate everything is indestructible. and you will never have to worry about a Wrath of God or Damnation .

I'll consider her if I end up in more multiplayer edh games (right now I only end up playing it in 1vs1 games and it's set up to deal with that now)

Gisela, Blade of Goldnight would be absolutely amazing. Her ability makes her a win condition on her own. If here and two other strong creatures swing at the same time then it might be game right there. Other than that it looks good. Quicksilver Amulet might not be necessary because of Kaalia though.

Yes I recognize Gisela's destructive power as well (she's on my to trade for list) as for Quicksilver Amulet it's a secondary Kaalia effect and it is often necessary as it possesses numerous advantages over her (not a creature, colorless mana cost, there are alot less destroy artifact effects in most edh decks than there are destroy creature effects, and I can sneak a bomb out at instant speed).