In general I would not use epics as food. Even if they are not very good now, they may get a buff one day, or there may be a new content introduced to the game where they can shine. Another reason to store epics is the faction guardian ring, where dupe champs can increase the stats of all champs of the same rarity and faction. Relic Keeper for example is a quite bad epic. But two Relic Keepers used as faction guardians increase the hp of all your epics from the Sacred Order faction by 10%.
That said, I'm not convinced of any of the epic champs you pulled. Hope is kind of ok, but not overwhelming. The others can go straight into the vault and wait for a dupe you may pull, so they can serve as faction guardians.
I would further not use any champs as food that are part of a fusion. You got the rare champs Marked, Halberdier and Channeler. They are needed to fuse the legendary Rhazin Scarhide. You can recognize fusion champs from the blue symbol in the bottom of their set card, between affinity symbol and champion level. Don't use fusion champs as food! I made this big mistake and had to wait nearly a year to get the wasted rare again, so I got my Rhazin much later than I could.
As you had bad luck with the epics you pulled, you got fantastic rares. Apothecary is worth lvl 60 for general content. Def aura for dungeons, healing and speed, this champ is great. One of the best rares in the game, I still use him as healer vs. the Eternal Dragon in Doom Tower.
Frozen Banshee is a top tier damage dealer vs. Clan Boss. Poisen is king at Clan Boss, Frozen Banshee (often shortened to FB) is among the best poisoners in the game.
And you got Master Butcher. Don't care about him for now, he doesn't bring anything you need at the early stage of the game you are in right now. But keep him for later. Once you progress in Doom Tower, this champ is great for Magma Dragon and Bommal. And his two turn provoke on the A2 makes him even usefull vs. Hydra. If you stay long in Raid, maybe in a few months you should remember that you have this champ and bring him to 60.
Another rare that may help in a ertain content later is Abyssal. Overall a mediocre champ, but he may be usefull in faction wars. No need to level him up now, but keep for later.
/edit: What Krama said about Chonoru is true. She could be a good campaign farmer. Never really thought about that, so my Chonoru sits in the vault and I built Saurus for campaign farming. 😣 Even after years in Raid learning never stops.