ROOF COBLESS

Fast tempo:    • RE Group-gloom cobless (fast tempo)  
Extreme fast tempo:    • RE Group-gloom cobless (extreme fast ...  
Variable tempo:    • RE Group-gloom Cobless (variable tempo)  
Extreme variable tempo:    • RE Group-gloom cobless (extreme varia...  
Sun recovery:    • RE Group-gloom cobless (sun recovery)  

This build is incredibly hard for me, about 2 times harder than the DE Cobless (   • DE Double Ice-shroom Cobless  ), because you have to know how to use Flower Pots properly.

Name: RE Group-gloom cobless
Builder: narpo

Tempo: Card 4 + DPS (C4IO): Doom | Squash - Ice | Jalapeno - Ice | Cherry. If the Jalapeno wave spawns too slowly, you can switch to Card 3 + DPS by using the Cherry Bomb to activate the spawning.

Use this tempo if there are at least Gigas, Gargangtuars, and some slow zombies. Otherwise, you should bring double Cherry Bomb instead of Double Ice-shroom to kill Zombonis.

Doom-shroom: crater sequence: 2-8, 2-7 (4-7), 4-7 (2-7), (3-9 on wave 9 if you play C3IO), 4-8, 2-7 (4-7), 4-7 (2-7), 2-9 (3-9). To put a Doom-shroom right underneath a Gargangtuar, press SPACE to PAUSE THE GAME. It takes 1.99 seconds to wake up a Doom-shroom, and 2.68 seconds for a slowed-down Gargangtuar to smash a plant, so if you can put a Flower Pot, pause, unpause, pick the Doom-shroom, pause, unpause, put the Doom-shroom on the Flower Pot, pause, unpause, pick the Coffee Bean, pause, unpause, and put the Coffee Bean on the Doom-shroom in 0.69 seconds, you should be able to wake the Doom-shroom. However, if you make a single mistake in one of these steps, you die.

Squash: if playing C4IO, use it immediately. If playing C3IO, delay it a little, giving time for the Jalapeno to recharge. After the Gigas disappear, the tempo becomes quicker, and other instants may not have recharged. In these cases, use a Squash to kill the Zombonis and use the instant on the next wave.

Ice-shroom: You can store Ice-shroom during the day and use them if necessary. Normally, use an Ice-shroom when Football Zombies are about to reach column 7. However, in some emergency cases (Giga is about to smash Gloom-shroom, Jalapeno's CD is not ready, or Gigas on row 1 or 5 are not slowed down), use an extra.

Jalapeno: same as Squash. If its CD is not ready, use the Ice-shroom on 3-2 and put the Jalapeno there.

Cherry Bomb: During the Jalapeno wave, if the Doom-shroom is about to recharge and the Jalapeno has recharged at least 1/3, or Gigas are about to smash the Gloom-shrooms, use it on 3-8 and play the C3IO tempo. Otherwise, wait for a new wave to spawn and use it on 3-9.

Major threats:
Giga: biggest threat. Usually, they need 1, 1, 2, 1, 1 instants on each row, but on rows 2 and 4 they generally need 2. If only 1 is used, they have to be frozen within the range of the Gloom-shrooms. The Winter Melons can slow most Gigas down, but on rows 1 and 5, Winter Melons may waste too much time on Imps, and the Gigas won't be slowed down. In that case, click an Ice-shroom immediately.

Zomboni: second biggest threat. They are naturally killed on rows 1 and 5, and they won't crush plants on 1-5 and 5-5. On rows 2 and 4 they are barely killed (not mathematically 100%, depending on how many times Winter Melons can hit them). On row 3 they need a proper rotation of instants. To procrastinate time, you may put Jalapeno on 3-2 and Cherry Bomb on 2-7/4-7.

Football: may damage Gloom-shroom on 2-6 and 4-6 if they are not frozen on Column 7, but as long as they don't inflict too much damage, you can always replace the Gloom-shrooms at an easier level

Jack: unfortunately this build does not have good Jack suppression. Theoretically, if not slowed down, Jacks on 1 and 5 will be naturally killed by Fume-shroom and Gloom-shrooms. If slowed down, that means they suffer splash damage from the Winter Melons on row 2 or 4, which is greater than the damage of a Fume-shroom. This is roughly equal to 2 Fume-shroom natural suppression. On rows 2-4, they follow the "7-column Gloom + Winter Melon suppression". However, this structure only protects the Gloom-shrooms, not your instants, especially Squash. They can be taken out by Jacks even if you put them before Jack opens his box.

Ballon: occupies 1 seed slot and consumes extra sun

Can this build survive endlessly? I think no. Some very advanced players can play for more than 50 flags, but they have to use save/load (save the gamedata file so you can revert back if you make a mistake).

Reference:
https://tieba.baidu.com/p/6621127630?...
https://www.bilibili.com/video/BV1xc4...