Wyburster and Collapserpent are really, really good in Agents. Actually. I don't have any time to do a full analysis or take care of my thread this month either, so I'll just post some thoughts about these massive trolls here...
They have incredible synergy with any deck that runs any non-insignificant number of LIGHTs and DARKs (5-6 is usually enough) and runs either Tuner monsters or Monarchs / similar cards. Because they are a floater if used for those purposes, they offer a free body in addition to being able to push for extra damage, and it is usually a fine move to just summon one. Agents have good synergy with them because of the deck's ability to make Gachi Gachi relatively easily, which turns these monsters into decent floating beatsticks, and the deck also appreciates having an additional number of low-investment early plays to push for advantage so that its boss monsters can clean house while the opponent wastes resources on the cheaper monsters; thus Wyburster / Collapserpent are a perfect fit for the deck. Additionally Wyburster and Collapserpent offer great Graveyard manipulation as well as good synergy with Tour Guide -> Leviair, so there's that aspect too... have too many LIGHTs in grave and no DARKs? No problem, just summon Collapserpent and make Beastlord Volcan with your Earth (or, you know, use it in any other way you want, because there are a million cool things you can do with them).
Following list in imitation of Simon He's Agent Angel decklist ... well, the S/T lineup anyway.
Monsters - 30
2 Bright White Dragon Wyburster
2 Darkness Dragon Collapserpent
2 Thunder King Rai-Oh
3 The Agent of Creation - Venus
2 The Agent of Mystery - Earth
3 Master Hyperion
3 Mystical Shine Ball
2 Effect Veiler
2 Tragoedia
1 Gorz the Emissary of Darkness
2 Tour Guide of the Underworld
1 Sangan
1 Night Assailant
1 Spirit Reaper
1 Honest
1 Chaos Sorcerer
1 Black Luster Soldier - Envoy of the Beginning
Spells - 9
2 Mystical Space Typhoon
1 Creature Swap
1 Forbidden Lance
1 Mind Control
1 Enemy Controller
1 Dark Hole
1 Heavy Storm
1 Monster Reborn
Traps - 1
1 Treacherous Trap Hole
Extra - 15
1 Scrap Dragon
1 Ally of Justice Catastor
1 Armory Arm
1 Beastlord Volcan
1 Black Rose Dragon
---
1 Armored Kappa
1 Daigusto Phoenix
1 Gachi Gachi Gantetsu
1 Number 11: Dark Mist
1 Leviair the Sea Dragon
1 Number 17: Leviathan Dragon
1 Number 30: Acid Golem of Destruction
1 Wind-Up Zenmaines
1 Number 39: Utopia
1 Gagaga Cowboy
They have incredible synergy with any deck that runs any non-insignificant number of LIGHTs and DARKs (5-6 is usually enough) and runs either Tuner monsters or Monarchs / similar cards. Because they are a floater if used for those purposes, they offer a free body in addition to being able to push for extra damage, and it is usually a fine move to just summon one. Agents have good synergy with them because of the deck's ability to make Gachi Gachi relatively easily, which turns these monsters into decent floating beatsticks, and the deck also appreciates having an additional number of low-investment early plays to push for advantage so that its boss monsters can clean house while the opponent wastes resources on the cheaper monsters; thus Wyburster / Collapserpent are a perfect fit for the deck. Additionally Wyburster and Collapserpent offer great Graveyard manipulation as well as good synergy with Tour Guide -> Leviair, so there's that aspect too... have too many LIGHTs in grave and no DARKs? No problem, just summon Collapserpent and make Beastlord Volcan with your Earth (or, you know, use it in any other way you want, because there are a million cool things you can do with them).
Following list in imitation of Simon He's Agent Angel decklist ... well, the S/T lineup anyway.
Monsters - 30
2 Bright White Dragon Wyburster
2 Darkness Dragon Collapserpent
2 Thunder King Rai-Oh
3 The Agent of Creation - Venus
2 The Agent of Mystery - Earth
3 Master Hyperion
3 Mystical Shine Ball
2 Effect Veiler
2 Tragoedia
1 Gorz the Emissary of Darkness
2 Tour Guide of the Underworld
1 Sangan
1 Night Assailant
1 Spirit Reaper
1 Honest
1 Chaos Sorcerer
1 Black Luster Soldier - Envoy of the Beginning
Spells - 9
2 Mystical Space Typhoon
1 Creature Swap
1 Forbidden Lance
1 Mind Control
1 Enemy Controller
1 Dark Hole
1 Heavy Storm
1 Monster Reborn
Traps - 1
1 Treacherous Trap Hole
Extra - 15
1 Scrap Dragon
1 Ally of Justice Catastor
1 Armory Arm
1 Beastlord Volcan
1 Black Rose Dragon
---
1 Armored Kappa
1 Daigusto Phoenix
1 Gachi Gachi Gantetsu
1 Number 11: Dark Mist
1 Leviair the Sea Dragon
1 Number 17: Leviathan Dragon
1 Number 30: Acid Golem of Destruction
1 Wind-Up Zenmaines
1 Number 39: Utopia
1 Gagaga Cowboy