If Al Bhed Salvagers dies at the same time as one or more other creatures and/or artifacts you control, its ability will trigger once for each of those permanents, including itself
Joshua, Phoenix's DominantJoshua, Phoenix's Dominant enters with a Faithless LootingFaithless Looting, and then when you flip and hit the third chapter, you've got cumulative six mana worth of creatures from your graveyard, then another Faithless LootingFaithless Looting from Joshua flipping back
ETBs are one of the most undercosted things in the game, and copying a good one for two blue mana is a steal
Firebending abilities aren't mana abilities
At the start of its controller's upkeep it creates a 1/1 Eldrazi Scion creature token, which can be sacrificed to produce one colorless mana