Sorry but no one should buy any of these packs. They are deceptive marketing. You are buying something and you have no clue what it is. There is nothing but a one-liner about what you're getting on them and they could have anything in them and you could be paying money or crystals for something that only costs 100 energy to farm.
I would recommend no one get them until CG fixes the deception ingrained in these pop-up packs. (I'm not talking the 25+25 Kryotechs for 4.99, those are fine. that's how these should be presented because you know EXACTLY what you are buying.) This is "surprise mechanics" to the extreme.