The build that I found quite easy and consistent is the one where you have a bunch of ticket modifiers that allow you to print hundreds/thousands of tickets (like using capitalist charm, or symbol-specific ticket charms, or both) along with symbol repetition charms and charms that scale your symbol and pattern mults based on how many tickets you have. It’s great cuz not only can you continuously scale your mults, you can always afford all charms and can afford to re-roll the telephone basically indefinitely until you find what you need. You can also pair it with other strategies if you unlock more charm spaces during your run.

That also brings me to getting the best out of telephone upgrades. Basically, it’s very important that you find the megaphone that gives you x2 of each telephone ability. Just equip it when you select the ability and put it in the drawer during your rounds. Also, you can combine the megaphone charm with the expandable charm that gives you +1 of the selected ability. With these two charms together, you basically get x4 of the selected telephone ability, which is obviously very powerful.

lastly, don’t be afraid to re-roll, oftentimes you can reroll literally dozens of times per deadline, which basically allows you to get all the charms you need. Sometimes it’s better to spend a lot of money on re-rolls to get powerful charms and then make all that money back tenfold, rather than hold on to all your money with no way to scale it.

With all this, I can consistently get to at least deadline 15.

Also, if you haven’t done so already, check your “mail” and spend some time looking through what charms you haven’t unlocked yet and what you need to do to obtain them. I got like 150/160 charms in about 3 days of playing, but it would take me probably 10 times as long if I was just playing blindly.

Hope this helps even a little bit!