Is this budget Terra-Geddon deck viable in Premodern Magic?

This is an established deck in the format, but I have an alternate deck list which doesn't require to buy 4 copies of Mox Diamond, since they are insanely expensive.

"Terra-Geddon"

4 Terravore

4 Exalted Angel

4 Llanowar Elves

4 Fyndhorn Elves

4 Birds of Paradise

4 Werebear

4 Armageddon

4 Winter Orb

2 Sylvan Library

2 Naturalize

Land (24)

10 Forest

10 Plains

4 Brushlands

Sideboard

4 Tormod's Crypt

2 Naturalize

3 Compost

4 Ravenous Baloth

2 something else, not sure yet.

Pros: You recover from Armageddon way faster than opponent due to having 16 "Mana-dorks" in the deck.

Werebear can get Threshold following an Armageddon, making it a 4/4 for just 1G mana cost.

There are 12 total win conditions in this version of the deck.

Winter Orb also combos very well with Mana-dorks.

Cons: Your opponent will rage quit if and when they lose.

Is this budget Terra-Geddon deck viable in Premodern Magic?
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