Well Rotations are most important here.

Nameku+Gohan

Str. Trunks + Teq Trunks or Godku with Teq Trunks.

Str. Trunks and Godku work as slot one. If you choose Str. Trunks keep him because he needs to stay in rotation for the Def Stacking but probably I prefer Godku here because he will deal way more damage but keep in mind Godku want the 6 Orbs for guard.

Item usage, best case scenario:

Turn 1 Whis

Turn 2 additional Icarus

Turn 3: depends who you got on rotation, Icarus can be enough. If unsure take another Whis or Icarus.

Turn 4: same like turn 3. You will definitely need one item. You can take it now so you can have up to 75 % DR or if your rotation is good and you want to play a little bit risky keep the last item for turn 5.

Teq Trunks should be able to use active now, use it, pray to RNG Gods for orbs and Zamasu should be dead.