Op 4 to Op 8 help

Hey I am a level 72 op 4 commando and I really need help to reach op 8, I don’t have very good guns or legendary class mods and it’s really hard to do the digistruct peak. So I would really appreciate If somebody helps me, also I have op 8 gear as a reward. I am playing on Xbox one, here’s my gamertag: LordNightmare19