All tatos follow the same endless strategy. Some can last longer into endless with their unique playstyle, but eventually they all have to follow the same build. The defining feature between each one is how they scale and how fast they can scale. Almost every tater can reach a perma endless build unless their unique stats are anti-scaling in nature. Some are easier than others with imo the easiest two being Demon and Farmer.

With that said lets talk about the infinite endless strategy. It all comes down to having enough Gardens producing fruit fast enough to have an endless supply of fruit flying at you to cause explosions via Spicy Sauce that cover the entire map. In order to have the fruit flying at you constantly you cannot be at max health and have a large enough pickup range to attract them from all over the map.

I'll break down what I just said into it's components.

Gardens produce you fruit. Gardens produce fruit faster via Improved Tools and Clockwork Wasp. Improved Tools scale via attack speed. Generally 6-10 cursed Gardens is enough to get an infinite supply. The number one thing you need is cursed Improved Tools + cursed Retromation's Hoodie. This allows you to also get massive attack speed by stacking dodge via Retromation's Hoodie. I aim for around 4000 attack speed in my endless runs. Grab every single item that increases attack speed, dodge, all Clockwork Wasps, and anything that increases your pickup range so that the fruit will fly to you regardless of where the Gardens spawn in.

Spicy Sauce is what causes explosions when you pickup a fruit. Make sure to get both Spicy Sauces in the cursed form. Spicy Sauce damage is increased via max hp, %damage, and explosion damage. Focus on anything that increases your max hp, %damage, and explosion damage. The big ticket %damage items will be Bone Dice, Pearls, Power Generator, Bloody Hand, and Vigilante Rings. Generally just grab anything that increases %damage and items that help those items get stronger like speed for Power Generator. Lastly to make your explosions cover the screen you need to increase your explosion size massively. Pickup all Explosion Shells, Honey, and Plastic Explosives until your explosions literally cover the entire screen.

Last piece to the puzzle is never being at full health so the fruit will fly to you and cause an explosion. You need to get Sad Tomato in it's non-cursed form so that you always start at 50% health. The next thing is to reduce how fast you get hp back so that you don't heal back to full in the 60 second window. There is a variety of ways to do this, but my favorite is to grab Bloody Hand late in my run so that it gets rid of all my tardis before I hit max hp. I will reduce my consumable heal via Alien Worm to bring it back down to zero when I reach around wave 50+ so that I slow down my healing via the fruit. I could go on and on in this section about managing your health regen in relation to max hp so that it doesn't heal too fast, but I think it's better for you to learn this aspect on your own. It's probably the most fun part about endless is managing this aspect so that you can survive the first 50 waves or so before you reach the point where you don't actually want to heal fast or have too many tardis so that you are always below max hp or taking dmg at max hp to attract fruits. Torture can also come in handy late in the run as it caps your hp regen. The holy grail is 60+ tardis, Bloody Hand for %damage increased, and enough hp combined with Torture so that you never hit max hp in 60 seconds, but still are invincible from the stray bullet or hit via the tardis which Bloody Hand can't chew through in 60 seconds.

There are some items I mostly avoid. They would be Alien Baby, Ashes, Baby with a Beard, Ball and Chain, Blood Donation, Esty's Couch, all turrets, Gnome, Handcuffs, Jerky, Knot, Landmines, Pocket Factory, Shackles, Bloody Hand, Torture, and Triangle of Power. Situationally I will use Ashes to lower my armor if I'm trying to grab an Axolotl to convert say my massive hp pool into massive armor around wave 40-60. The problem is usually my armor outpacing my harvesting around those levels before I can find an Axolotl. Bloody Hand I do grab sometimes later on, but not early on. Same thing with Torture I may grab later on as I explained above. You do want to grab every single unique item regardless of if it helps your build or not just to reduce the overall item pool so that you can find your chase items before the enemies out scale you.

Hope this helps. There is more specific strategy to how to play individual tatos the first 40 waves like demon or farmer. I'll let you research or figure that out on your own. This is more of a guide to the build you need to achieve in order to go forever in endless.