If the question were about phantom, there’s no doubt recon phantom is the most used right now but what about vandal skin?
Is it still prime vandal?

Get both now or later.
I bought Oni first, great phantom. After a year, I got bored and I got Recon, also really good. You cannot go wrong on any.
Last year, oni was the most phantom skin used on tournaments. This year recon is the most used phantom skin on tournaments.
Enjoy your skin, you can always buy more.