I beat Bert today using Crazy Carrot 2-2-1 Tiny Snowman 1-1-2 and Living Sandling 2-1-2

Worked perfectly and got Dibbler at 1st attempt ! :)

Sun Sproutling(1,1,2), Singing Sunflower(2/1/2), Jademist Dancer(1/1/2)

Not 100%, but works pretty well. Start off with Photosynthesis, Sunlight, and Solar Beam. When first guy is dead, fight until current pet is dead then switch to Jademist. Jadeskin must go up first, geyser, then Steam Vent. Often it will end up that geyser will go off after resurrection and finish them, or it will stun them after your pet is killed so lets your last pet come in and clean up easy.

Fel Flame 1-2-1 (strat differs slightly at the end for the 3 different breeds)
Hatespark the Tiny 2-1-1
Lvl10+ pet

Turn 1. Scorched Earth - Tiny is swapped in
2. Conflagrate - Fel Flame is swapped in
3. Conflagrate - Tiny is swapped in
Corporal Hammer activates Failsafe
4. Flamethrower
Hammer dies
M-37 comes in
1&2. Deep Burn
M-37 activates Failsafe
3. Flamethrower
M-37 dies
Clamp comes in
1. Pass - Depending on crits against Tiny, you may not need this round, if you do need it and Clamp uses Storm Coil, you might as well reset because it will then have its 2 strongest attacks available against your Fel Flame, if Tiny dies before this round, you should be fine
Tiny dies
Bring in Fel Flame
2. Conflagrate
3. Scorched Earth

For H/P and H/S breeds;
4. Burn - You may not land this or even see this round
Fel Flame dies
Sometimes Clamp activates Failsafe, sometimes not
Bring in Leveling Pet
5+. Finish with your most powerful attack/s. Remember that Scorched Earth will tick for 61
(H/P) or 56 (H/S) damage per round

For H/H breed;
4. Burn
5. Pass
Fel Flame dies
Bring in Leveling Pet
Then: Finish with your most powerful attack/s. Remember that Scorched Earth will tick for 56 damage per round

Unlike most strats I've seen, it's Clamp that can really screw this one, not M-37. Just remember; on round 10 it's better to refresh the Scorched Earth DoT than to push Clamp into Failsafe with Burn and have the weather effect fall off just when your leveling pet needs it most.
I find it's best to use leveling pets with at least one strong Elemental DoT attack - such as (Fel) Immolate, Poison Lash, etc. - to push Clamp into Failsafe, then hit it with any attack ~150 damage. In fact, it's best to only use Elementals as they do more, and take less, damage overall and take none from Scorched Earth.

I've 2 pet this 3 days in a row with Doom Bloom & Fel Flame
Stun Seed - Burn - Lash - Immolate - Seed stuns Commander which makes M-37 come in - Immolate - Conflag and Burn kills M-37 with only 2 firebombs active - Commander comes back at minor health or dies from immolate while m-37 fighting. Use Immolate/Burn/Lash to kill Clamp, with bad rng might need 3rd pet for a killing blow.

I messed up the rotation should be Stun Seed - Immolate - Lash - then the stun comes. I've also gotten 3 dots of firebomb lately and needed a reliable 3rd pet like Darkmoon Tonk to finish off Clamp. RNG can be so frustrating but this should work all the time.

this is the strat i got to work for me. i was lacking the pets for all the other strats.

Thanks!

This really needs to be elevated into an option in the main strategy choices; the main strat suggested here has worked for me about 50-60% of the time, but THIS strat, the Doom Bloom / Fel Flame duo, has been 100% successful for me, over multiple fights.

Could someone please write a script for this option?

I was able to very safely 2-pet this fight with Broot (2/2/2) and H/H Ruby Sapling (2/1/1). I just kept Photosynthesis and Sunlight up at all times and spammed Ironbark. They got swapped back and forth between each other but were able to outheal the damage as long as Ironbark was there. While fighting Clamp he will have a turn where all of his abilities are on cooldown, so I used the opportunity to switch to my level pet and then back to the Ruby Sapling to finish the fight.

Your level pet will most likely take a couple hits on the backline from Storm Coil as well as a turn of the Firebomb ticks when it comes in, so it should probably be at least level 10, or maybe more.

TD Script

if [enemy(#1).active]
ability(404) [enemy.round=1]
ability(268) [enemy.round=2]
ability(298) [enemy.round=3]
ability(753) [enemy.round=4]
ability(826) [enemy.round=5]
ability(753) [enemy.round=6]
ability(404) [enemy.round=7]
endif

if [enemy(#2).active]
change(#3) [enemy.round=1]
ability(310) [enemy.round=2]
ability(179) [enemy.round=3]
ability(113)
endif

if [enemy(#3).active]
ability(179)
ability(Burn:113)
change(#2) [self(#3).dead]
ability(753)
endif

Thank you, script works great.

For some reason the script stopped working when it was supposed to switch to the crab when M-27 comes out. Made a slight change and it worked after.

if [enemy(2068).active]
ability(404) [enemy.round=1]
ability(268) [enemy.round=2]
ability(298) [enemy.round=3]
ability(753) [enemy.round=4]
ability(826) [enemy.round=5]
ability(753) [enemy.round=6]
ability(404) [enemy.round=7]
endif

if [enemy(2067).active]
change(#3) [enemy.round=1]
ability(310) [enemy.round=2]
ability(179) [enemy.round=3]
ability(113)
endif

if [enemy(2066).active]
ability(179)
ability(Burn:113)
change(#2) [self(#3).dead]
ability(753)
endif

Works perfectly now. I ran into the same issue with the one above with it not swapping. its amazing how one little change that doesn't seem like it should be a thing, is a thing. =P

Worked for me too, and I got dibbler using this first time (done it with the flyers loads of times) thanks :)

Used this strat 2 days , second day it failed first 2 times persisted and got it done third time, thanks.

Could you tell me what has gone wrong so I could know what to adjust, if possible?

Think it is just rng lucky crits from the npc pets. Just tried it again, success but Sunflower was left facing Corp Hammer, after his failsafe, Turnip and crab survived 811 and 1079 hp respectively. Are we missing a step to deal with Hammer after his failsafe activates?

Well, crits are something one can't always help in a such complex encounter. :)

I've repeated that, not getting any beneficial crit. In round 6, the Sunflower is supposed to trigger failsafe *and* damage Hammer for additional 415 damage, leaving the enemy on such low HPs the Sunlight from round 7 is enough to finish.

There was a version where two steps were missing, but it was replaced very soon, sooner than you wrote the most recent message.

Additionally, while facing Clamp, you should cast two Solar Beams, one during Sunny Day and one without. (If there was no Sunny Day first time, let me know!) I believe Clamp is cooldown-locked but even if not, the window for operation seems pretty huge.

This alternative was the best i have experienced. It was an one shot to Bert. Got also Dibbler.

Glad I could help, enjoy your Dibbler! :)