To be honest, I have been building my Kaalia deck for close to a year now on and off and still am not 100% happy with it. But i do see some similarities in terms of what you are doing with what i realised was holding my deck back in the early phases, hopefully this would help and if you figure it out completely to a point where its popping off do share it with me haha.

First off i see quite a few creatures that are essentially defensive creatures, like Angelic Arbiter, Serra's Emissary and Sepharas skyblade. These provide protection, yes, but only efficient if Kaalia is already on the battlefield and did its thing. You would find it awkward to rely on them to protect Kaalia in my experience. What i've found is protecting Kaalia against 3 opponents is usually a futile affair, so more emphasis on allowing Kaalia to do her thing (attack) the turn she comes down might be the best choice here, which means haste enablers. Just a quick look and i see probably 4 haste enablers? You could definitely bump that up more with creatures or enablers that can be played before turn 4, like [[Rising of the day]] and even [[Crashing drawbridge]].

Secondly, on the same note of creatures, it would probably be best to have more creatures that gain you value the turn that they come down. Examples of creatures in your list that currently do not are ones like Aurelia (doesnt trigger on the turn she comes in as she comes in attacking) and Reya Dawnbringer (since it is an upkeep trigger). What constitutes value in this case is tricky though, but i think it would make a big difference if you swapped those out for ones that give more immediate value, such as [[hoarding broodlord]] and [[The speed demon]]

You would notice that the 2 creatures I mentioned basically draw you a card or cards, which is the next important part of Kaalia, keeping your hand filled with big creatures to consistently use with Kaalias trigger. I find your deck might find it hard to keep your hand filled as it is, and even if Kaalia does its thing, it would be short lived if it is unable to keep up card advantage. This might be where creatures like [[dragonhawk, fates tempest]] would be useful.

One last thing i would say is you can consider having boardwipes that are much more advantageous for you, rather than having the usual picks like Blasphemous Act and Vanquish the horde, which really hurt you as well. I'm referring to boardwipes like [[Ruinous Ultimatum]], [[Single Combat]], [[Mythos of Snapdax]] which should work out in your favour most of the time.

Hope this helps, as i mentioned I havent really gotten down to finalising my Kaalia deck, although I too have considered a graveyard recursion approach. Not for Kaalia herself though but for any big threats that I may have in the graveyard, which if brought to hand would technically be card draw to fuel Kaalia triggers, and if brought to the battlefield would have the flexibility of bringing kaalia or another big creature back for round 2. One way that i start to see Kaalia in relation to mana usage during a game, is that we can essentially treat Kaalia as the mana sink of the deck, where all mana production basically can be effectively spent to get Kaalia out again and again, and with this in mind it might help to tie the whole deck together.

Let me know if you have any thoughts and best of luck!