Math Incoming, ETA 0400 UTC. Just reserving this parking space.
If you have any questions about my math, ask away.
COMMENCE THE NUMBERS:
So with 350k, you can buy 350 cases, but this is a silly idea if you’re after Cobalts. It takes an expected 1,000 cases (nearly three times what you have) to get a Cobalt, so’d you’d expect to get 0.35 Cobalts. [Statistical analysis gives about a 70.5% chance of NOT getting a Cobalt.] A full list of the Full Stat Cards (Bronze+) you’d expect is in the spoiler.
[spoiler]
Bronze: 26.25
Silver: 7
Gold: 1.75
Cobalt: 0.35[/spoiler]
If you were to recycle whatever came out of a case (including Cobalts), you would expect 65.06 Fragments per case. If you were to recycle everything BUT Cobalts, you would expect 52.06. Given you specified your goal as Cobalts, I’m going to use this second number for all calculations going forward, unless otherwise specified.
So, given it takes 50,000 Credits and 20,000 Fragments to craft one Cobalt, it would take an expected 385 cases (+50,000 Credits for the craft, a total of about 435,000 Credits if you bought every case). You may note that 385 is more than 350, but that assumes a starting point of 0 Fragments. You have 4,625 as a starting point. (If you want me to run numbers again with your current Fragments, or any other value you fancy, I will. Just give me time.)
Given that starting point, you need 15,375 Fragments, an expected 296 cases. Accounting for the crafting cost and buying every case, its 346,000 Credits. That’s not a lot of wiggle room if RNG decides to rear it’s ugly mug, but it is expected that you could get a single Cobalt for the merc of your choice. For buying 296 cases, you’d expect:
[spoiler]
Bronze: 22.2
Silver: 5.92
Gold: 1.48
Cobalt: 0.296[/spoiler]
BUT, for everything you choose to keep (asides from Cobalts, which I accounted for), you take away from the Fragments you can craft with. If you’re willing to scrap a Gold or a few Silvers that you already have, you’d be nearly guaranteed to get one Cobalt.
Ain’t that a kick in the teeth? I’m sitting on a dragon’s hoard of 490,000 Credits and over 100,000 Fragments (Hooray for Crafting Week, I recycled just a few cards.) until those Crafting changes decide to show up, or an Event with Special Edition Cards. (If you’re curious about the expected amount I’d get, CW/Dickens had a 0.3% from cases, ReV had a 1%, but cost 3.5 times as much because reasons (neglecting boosters because reasons). That’s 1.47 CW/Dickens or 1.4 ReV cards.)