I snagged The Abyss in pack two, which notably does not affect artifact creatures, and in the third pack I actually took Tinker over Mox Emerald because Tinker was more likely to lead to a broken start in my deck at that point, and had significantly more value later in the game
The right choice depends entirely on your primary use case
Most of the expensive cards gain their demand from collectors looking for great art pieces, but that doesnt mean that they cant go in decks and mix with the powerful trainer cards that Fusion Strike provides
To understand why, select Learn More
I began doing a Throwback Thursday post on my Facebook page where I link to an older article of mine that I still like, and then give you a quick paragraph of context about it
Chandras other modes are far better than Outpost Sieges, which ranks it higher on this list