Okay, so. The first question you should ask yourself, before you even play Kaalia as your Commander, is; "Do I like having friends?" If you said yes, you should immediately reconsider playing her. I used to make kids at my LGS cry with her.
That being said, if you don't value friendship you can add the following into this deck;
Quicksilver Amulet. Nothing says PAIN like dropping Kaalia, and then next turn playing Aurelia, the Warleader for 4 and swinging with Kaalia, dropping Rakdos/Avacyn (See Below), and Aurelia, then going to second combat phase, swinging with the team again and dropping another dirty creature (Balefire Dragon, needs to also be in this deck, see below). Its SO win. Its also a good way to be able to drop your high-cost creatures for a little less. All-in-all, NEEDS to be here.
Balefire Dragon. How much do you LOVE getting hit with Bonfire of the Damned? Yeah, me neither. This guy is like a Bonfire for 6 on a stick. You want him in here, because he's almost ALWAYS sure to sneak through when you drop him with Kaalia, and that generally results in a loss of board presence for the defending player. It also hits a LOT of hexproof Commanders that are difficult to get rid of.
Avacyn, Angel of Hope. 8/8 All permanents you control are indestructible.... I noticed you had a few things to give Kaalia Shroud/Indestructible. This one is another awesome one to have, and with Kaalia she's a Turn 5 10 points of damage.
Also, Slaughtergames. Because you want to remove their commander from the game too, because you're a terribly antisocial person.
Do you know me, Sin? Because you're fairly accurate about my LGS! Ha!
So I'm working on an Avacyn, Balefire and the Quicksilver amulet are a little spendy so it's going to take some time for me to get either of them...though I forgot about Balefire altogether so...that just made it on my "I shouldi get that" list xD
Which at the moment is Balefire, Avacyn, Quicksilver Amulet, and Iona (I think...the one that lets me name a color that can't be cast anymore)
Also, hadn't considered Slaughtergames....
Thank you very much for the feedback!
Iona is SO good! I completely forgot her.
You're welcome for the tips dude, hope it helps :)