>>42623721IVs are largely a meme. I have a near max stats Clefable that has been raping folks on the regular. On a whim I took fucking Primeape into a couple matches and found it performing well. Having good type matchups and good coverage on your moves will serve you better than just parroting the same teams of Azumarill, Deoxys, and whatever other shitfuck.
Also, you will rank up regardless of whether your win or lose your first fifteen matches, so feel free to use your bros. Good luck anon