I like the choice of cycling creatures (I always had a soft spot for Striped Sidewinder ever since a good Limited experience, it's nice that it found a home); maybe
Greater Sandwurm would work too? It probably won't matter too much though, since you'll most likely win once
Living End goes off no matter which fatties you have. Since that's the case, though, it seems like
Remand (and maybe also
Birds of Paradise, but I would be more hesitant to remove that one) increases the risk of a wasted cascade, getting in the way of the on-demand
Living End. Getting the end countered does suck, but even then I'd probably sideboard
Remand.
Overwhelming Denial is another option; it doesn't get Cascaded from
Demonic Dread or
Bloodbraid Elf (or
Violent Outburst, which might be worth taking a look at), and still works as a 2-mana hardcounter at any time you're playing
Living End.