What Token To Buy Chaos Legion Packs With?

Let me first start by saying that I don't have a definitive answer for this. What seemed to be an obvious choice became not so obvious after doing some long-term calculations.

The options

There are three ways to buy a Chaos Legion pack during the pre-sale. I'll assume that we have enough vouchers to make the purchase. At the time of writing, they are one of the following:

• 4,000 Credits
• 296 DEC
• 4.129 SPS

Given how inflated the value of DEC has become, it made sense to me to pay using DEC. I expect DEC prices to drop after the presale, at least temporarily. Additionally, we could easily earn that 296 DEC back with a few battles.

Over the long-term though

I plugged in what 300 DEC was worth into splintercards and got a surprising answer:

300 DEC is worth 11 SPS over the course of the remaining SPS airdrop period. So, even though DEC seems overvalued, it makes the most sense to pay for the Chaos Legion pre-sale packs with SPS.

Did you come to the same conclusion as well or am I missing something in my consideration?