Son of Serra:
1) Stax Hand One
You are playing 5C Stax and believe your opponent is playing something blue, maybe Tez, and you are on the play.
Mishra's Workshop
Tangle Wire
Mox Jet
Smokestack
Strip Mine
Goblin Welder
Sphere of Resistance
a. 8 out of 10
b. Keep
c. Strip Mine, Mox Jet, Sphere of Resistance (see above for additional thoughts)
Son of Serra:
2) Stax Hand Two
You are playing 5C Stax and your opponent is playing Fish. You are on the draw.
City of Brass
Crop Rotation
Black Lotus
Ancestral Recall
Tangle Wire
Smokestack
Triskelion
a. 6 out of 10
b. Keep
c. City of Brass, Crop Rotation for Mishra's Workshop (see if they have a counterspell), Black Lotus, Ancestral Recall. If all resolved and a Mox is drawn, play Triskelion. If not, play Tangle Wire if possible.
The reason this hand is sort of weak is that if they counter the Ancestral Recall, you are very vulnerable to a Wasteland.
Son of Serra:
3) Stax Hand Three
You are playing 5C Stax and your opponent is also playing Stax, but more of an aggro deck like MUD. You are on the draw.
City of Brass
Goblin Welder
Bazaar of Baghdad
Vampiric Tutor
Tangle Wire
Tangle Wire
Trinisphere
a. 5 out of 10
b. Keep
c. If they did not play a Sphere of Resistance, play City of Brass, Goblin Welder. If they played a Sphere of Resistance (or Lodestone Golem), Bazaar of Baghdad and dig like hell for mana!
This hand absolutely depends on Bazaar of Baghdad to be good. If it does not dig good cards up or if it gets hit with a Wasteland too soon, this hand is very weak.