I have officially done it, I have made my smurf get a higher rank through only provisionals
Some of you might not think this is a big deal, but on my main I get like 15 LP a win at Gold IV 75 LP (this account). On my smurf I'll get like 25~ LP a win and it's Gold III!
I'm sure I just had some bad games on my main, but I genuinely feel I got some pretty unlucky matchups on my main, it was much easier to achieve a higher rank on my smurf with just Tier 2 runes and only playing TF, Poppy, Ryze, and Annie.