Its definitely possible that he winds up being too explosive
With the Tiger, we can be guaranteed to cast it next turn and then have Prey Upon available on our untap step as long as the Tiger still draws breath
No matter what spell you cast with the first cascade trigger (or with any cascade triggers that result from casting that spell), the second cascade trigger will look for a spell with converted mana cost less than Maelstrom Wanderer's converted mana cost of 8
However, technically speaking, that's not the end of the story
Waste Not 8 Swamp 4 Fatal Push 4 Field of Ruin 4 Thoughtseize 4 Waste Not 3 Geier Reach Sanitarium 3 Castle Locthwain 3 Go Blank 3 Liliana of the Veil 3 Sheoldred, the Apocalypse 3 Sunken Citadel 2 Hive of the Eye Tyrant 2 Sheoldred's Edict 2 Bandit's Talent 2 Hostile Investigator 2 Path of Peril 2 Extinction Event 1 Urborg, Tomb of Yawgmoth 1 Demolition Field 1 Go for the Throat 1 Takenuma, Abandoned Mire 1 Duress 1 Graveyard Trespasser 2 Duress 2 Invoke Despair 2 Mazemind Tome 2 Path of Peril 2 Sheoldred's Edict 1 Pithing Needle 1 Reckoner Bankbuster 1 Graveyard Trespasser 1 Extinction Event 1 The End Waste Not is all about discard spells
What if winning with the hedrons involved getting them into the right position