Quoted from Damien:
The most I've had is 54, and I've been to Horde and I'm very close to Terminus. Considering Terminus is pretty tough to reach, and even at that point, you might be at 40-50 zombies, it's insane to think you're still not even halfway.
I’m currently actively trying for LMS, and have been ignoring score and prioritizing zombie kills.
One key piece of rule knowledge is that zombie kill shots that are ALSO multi-kill collects (ie, the yellow insert is lit) gives you TWO zombie kills, not one.
So, strategically, make sure to get a multikill going ASAP, and then collect as many walker kill/multi kill shots as possible. Each one brings you two kills closer.
Play WW and Prison MB focused on collecting kills or advancing to the next Blood Bath. (But do NOT stack them.)
Don’t play your first Blood Bath until you’ve played the first Prison and WW multiballs. Then, use Blood Bath to get yourself close to the next prison and WW multiball.
If you’re on a premium or LE, take full advantage of prison / walker bombs. Get one shot away from starting that multiball, then focus on nothing but walker kills until you drain, then using the bomb to save yourself and start the multiball.
You can’t collect walker kills in Horde, so have fun, but make sure to not lose your ball in Horde; time it out or “escape” to preserve your ball and go for more walker kills.
If you want to make things easier, increase the number of shots simultaneously lit for zombie kills from 4 to 5.
I started using this strat last week on a premium, and have one game with 80 kills, and two in the 70s. Getting there!
It’s going to be hard to do on a pro, without the prision and walker bombs, no matter what; good luck!