You shouldn't sacrifice any of them.

It can be very tough to acquire rares + epics + legendries.

You should keep at least 1 copy of each one.

Out of the 10 heroes you mentioned, the below 4 heroes stand out to me the most.

• High Khatun
• Gorgorab
• Valla
• Lich

The other epics you have do have niche uses.

They can be viable in certain things which you might need later on down the road.

The above 4 hero's, I am choosing got more useablity.

Smaug149 said:

My ten epics, Who’s worth booking and stuff and who should I sacrifice?

Baerdal Fellhammer

Shaman

High Khartoum

Jizhoh

Gorgorab

Torturehelm

Valla

Corpse Collector

Jotun

Lich 

Hi Smaug,

yeah is better to don't sacrifice nobody because maybe will be helpful for one of the future fusion or something else.

I will book maybe only Gorgorab for Arena, other champions is good but only for dungeons and midgame.

The best choose is to farm 2 stars champions and grow up to 3/4/5 stars and sacrifice them.

Have a nice day

fellhammer is ok for fire knight (multihit a1 + constant  self ca + heal debuff) - not sure if worth booking but I would say yes for lvling