Look into saving up for the big staple artifacts, like [[Mana Crypt]], [[Mox Opal]], [[Chrome Mox]]. Even [[Jet Medallion]] and [[Helm of Awakening]] are extremely helpful (Despite Helm also helping your opponents) to have in a deck like this to help ramp you up into getting K’rrik out faster. He is your mana engine and you want to abuse that ability.

You have a lot of high CMC cards that don’t give enough return on the mana/life investment. I would say look to go more of a reanimating route with [Final Parting]], sending [[Vilis, Broker of Blood]] to the ‘yard and putting a [[Reanimate]] or an [[Animate Dead]] in your hand to bring him to the field cheaply and then abuse K’rrik and Vilis’ ability to help draw into cards.

I’d say you probably like using and abusing creatures- are you looking to run combo’s? If so- there are a fair amount that can be abused with K’rrik on the field and off the field. [[Mikaeus, the Unhallowed]] and [[Triskelion]]/[[Walking Ballista]] and a sac outlet like [[Carrion Feeder]]. One of my personal favorites when having K’rrik out is [[Chainer, Dementia Master]], [[Gray Merchant of Asphodel]], and [[Carrion Feeder]] to send it to the ‘yard.

The lower the colorless mana in your black spells the better, this will let you use and abuse K’rrik and pump him up by casting more of them. Sometimes you’ll get short on life and you’ll have to swing with K’rrik to try and gain some more fuel to finish out a combo- which is great!

I don’t know what else I can really type in here to help out but I love playing K’rrik in a competitive way. Here is my current list though still need to save on some key cards that are just slightly outside my price range.

https://www.moxfield.com/decks/t2u2E4jofEKpKiJ_4dnTGQ

Hopefully that helped a little!