I would recommend Grave Betrayal . Not a huge fan of Stormfront Riders it is just too conditional, lacks true power. Since the deck looks like it needs more sac outlets I would recommend card:Ashnod's Altar, Attrition or Altar of Dementia (since it looks like you are running graveyard shenanigans). Carrion Beetles don't add that much at all to the deck as a whole. Mortician Beetle is a more fun replacement.

Elder Cathar is another one of those cards who is just mediocre, I would recommend spot removal spell or board wipe in his place. Selfless Cathar only helps once, but I feel it could be better replace with Blood Artist .

You could remove some of the cards which only remove creature from graveyards but do nothing else for something like card:Necromancer's Covenant. Also Geth, Lord of the Vault could come in handy for getting more sac outlets.

I was already looking at getting grave betrayal . I took out stormfront riders, selfless cathar, elder cather, and carrion beetles and replaced them with oblivion ring, cellar door, path to exile, and thoughtpicker witch. I am thinking about adding a lilliana of the veil.

What is your budget for this deck because I also recommend Grave Titan and Beacon of Unrest . Vish Kal, Blood Arbiter would also work in this decks them fairly well.

Luminarch Ascension could also work well to creature strong tokens for either attack or using as a sac outlet.

My brother sent me all four EDH playable titans through the mail so I should be getting a grave titan soon. I just ordered geth, both alters and grave betrayal. My budget is kind of low since I am in collage. The most I can pay for a card is around 5 dollars with a few exceptions

I am also getting Liliana Vess and Leyline of the void. Would you advise adding the leyline?

Hmmm Leyline of the Void is a hard card for me to judge, since it really depends on the decks which you commonly play against. Do they use a lot of graveyard tactics?

Along with that Mikaeus, the Unhallowed is absolutely wonderful in a graveyard deck.

The main problem with Mikaeus, the Unhallowed in my deck is that he only protects non humans. I ran this deck before then broke it down but my brother liked it so I remade it adding some new cards that I had. Advice on my Riku deck would be appreciated also if you can.

Why Elspeth, Knight-Errant and not Elspeth Tirel ? Hoping for the ultimate?

You could also consider such cards as Thraben Doomsayer , Geist-Honored Monk , Requiem Angel , Knight-Captain of Eos and Captain of the Watch .

And if you wanna nerf people before they go nuclear, play Identity Crisis . Sure, it's a one-off, but if timed properly it makes a player lose.

As far as Elspeths goes I only own the one and I do have Geist-Honored Monk but the others I do not have and might consider getting. I was mainly considering Requiem Angel for its ability to produce tokens.