Today I got my first round 100 ever on Alpha Omega! I know this is one of the easiest round 100s but I'm still proud of how far I've come in zombies lol.
I did the common strat of turning on power and not turning on the generators. I combined the Electric Burst modifier perk with Ethereal Razor, and then camped on top of the yellow house with the ballistic knife. I used the Ray gun for dog rounds and also didn't buy the door behind or below me. Dogs often get stuck in the yellow staircase, so I recommend using frag grenades and throwing them in the window at the end of rounds.
Anyways, I'm working on EEs for the rest of BO4, but what would you recommend as a good next round 100 to try? I play anything WaW through BO4.