Yes this is the true eidolon killer build

Please all the other builds are lies, you only need minimum 40% cc to deal massive dmg. The higher the lowest damage you can deal the better if that makes sense.

I highly recommend getting a RIVEN - and then replacing something with it ( preferably the [Primed Cryo Rounds]) . You are looking for Multishot and Crit dmg and an unharmful negative.
If you have a riven with +heat or +elec thats also a good role. Dont be scammed lol

DOn't forget to keep up the cc counter when doing eido hunts so take extra ammo pizza's.