1 - Loxodon Warhammer vs Captain's Claws vs Bloodforged Battle-Axe vs Sword of the Animist vs Heirloom Blade ? What order ?
Warhammer > BF Battle Axe (testing) > Heirloom Blade (testing) > Claws (cut for never seeing play)
2 - Reflecting Pool vs Undiscovered Paradise ?
Reflecting pool > Undiscovered Paradise
3 - Beast Within vs Primal Command ?
Beast Within > Primal Command
4 - Crystalline Crawler vs Metallic Mimic?
Crawler > Mimic (Mimic if you are pushing tribal)
In powered, I like Revoker to disrupt moxes (and other broken fast mana) and Needle because it's cheaper. In unpowered, I like Spyglass the most, and probably Needle 2nd because it's cheaper. So I think it changes a bit based on composition and whether or not you run Trinket Mage.