Your turn 1 lose doesn't work because phyrexian mana is a cost. You can't pay 2 life if you don't have 2 life. However, with Mana Crypt, you can go down to 2 and then use Ancient Tomb to lose, since it's not a cost.

Also, how does this deck do in the mirror?

Oh, I see, I guess I will add the pacts. I will get around to that soon. What do you mean by the mirror?

When this tests against itself, who loses?

I'm not sure. I'll try.

Dummy #1 Took a hand with Stomping Ground, Steam Vents, Temple Garden, Crystal Vein, Unexpected Results, Fastbond, and Immolating Souleater.
Dummy #2 Took a hand with Verdant Catacombs, Misty Rainforest, Steam Vents, Sacred Foundry, Stomping Ground, Breeding Pool, and Fastbond.
Dummy #1 went first and played a Temple Garden untapped, (18 life) Then proceeds to play Fastbond, and Steam Vents, (15 life) then played an Immolating Souleater going down to 2. Dummy #2 Drew Ancient Tomb, played Verdant Catacombs and sacrificed it to tutor for a Breeding Pool untapped. (17 life). Then played Fastbond, and Misty Rainforest, and sacrificed it for another untapped Breeding Pool, (13 life), and then played the following: Steam Vents (9 life), Sacred Foundry (4 life), Stomping Ground (-2 life), Breeding Pool (-9 life), and Ancient Tomb (-17 life) (all untapped).

I see.

Yup, pretty one sided. It was close, by 2 life! But yeah. Dummy 1 pulled through.

If you want to win with this, Near-Death Experience is pretty nice.

lol, also Death's Shadow.