I finished olympus and I want to fight ice titan. How can I do this without replaying the first 5 layers again?

You can't. You have to start at the first floor and make your way through all 30 floors.

Yeah, you will need to start the whole episode again and make your way up to layer 30. I suggest is that you level up to at least lvl 60-70 before fighting him.

Yeah, you will need to start the whole episode again and make your way up to layer 30. I suggest is that you level up to at least lvl 60-70 before fighting him.

 

Not really necessary if you have licenses. I managed to beat him at level 45 in no time with two of each of the good licenses (defence, strength, auto-block)