We need help with Underdome's Greater Challenges PS4

Hi! So, we are level 41 Soldier and Siren and we like to collect trophies.
Problem here is, that damn this is one takes forever, and we are asking for help.

It doesn’t have to be all 3 in same playthrough, no no no. But all must be completed in some point in order to us to feel satisfied with 100% of trophies.

We usually play at night, but as we live in Europe it messes up with many time zones but we can make it work, I’m sure of it haha.

My psn is rotanpoikanen666.
Thank you for considering!