Fellow blink-deck player here!

First off, Karmic Guide is as good as everyone makes it out to be. It's reanimation, it's blinkable reanimation, and the creature that comes back sometimes has an ETB ability of some use. As for the echo cost, it is a bit steep, but usually either you pay it because you aren't going to do anything else that turn, you don't pay it, or you blink it in response to the echo trigger and both get another creature back and don't have to pay echo that turn!

Mistmeadow Witch , Cloudshift , Nephalia Smuggler , and Ghostly Flicker are all really nice flicker effects that due to being instant speed can evade spot removal.

Mulldrifter , Ondu Giant , and Mnemonic Wall are excellent sources of card advantage.

I'm going to assume that you have the cards in your maybeboard and heavily encourage Lavinia of the Tenth , Luminate Primordial , and Phyrexian Ingester are excellent for removal, something that a blink deck really wants to do. The Avenger of Zendikar can also be very excellent as a way to win alongside your infinite combo.

This seems like a fairly budget deck, but if it isn't then I'd be happy to give you more suggestions!

(shameless self promotion of blink deck: Blink, Or You'll Miss It)

Minda-Kun~

Thank you

The maybeboard are things I have on hand, yes. And this is kind of a budget deck as in my budget isn't infinite, but if I see something I like and it isn't overly expensive I'll grab it.

And I'm not sure what exactly I'd take out for the things I could add. That's really my bigger problem. My CMCs are starting to get a little steep for my liking.