Game too hard or am I noob

[Ritme]

I am on the third world and the first wave of mobs kill my strongest units, like im trying to survive with 2x full Jotunn zombies for example and use all my spells and my zombies just die. How to survive 3rd world?

[skullivan2]

Farm in 2nd disc until you have enough meta upgrades.
If you are not already doing it send out the basic skelly to help collect bodies in the immediate vicinity along with the cat to make a dead that can kill the initial lairs in the morning.
Its all about body farming to put together viable "end game" deads. Jotun are not endgame. Mechs, devil(ish), aboms are endgame. Look for the highest damage fastest firing you can with as much armor and vamp that you can get.
You could always farm the 100k i think for the mech assembly line meta that trivializes the game.

[AerinSwift]

Collect the bodies with starting skeleton using a magnet artifact as quickly as possible and make the titan from available scraps. Collect some more bodies, make second titan and crush the map.
No meta progression needed really except 3 titans cap upgrade.