otherwise you won't get proper sponsorship deals.
for the stats, check this
https://www.mobamanager.gg/community/forum/topic/show/3101
you kinda need all stats on a PR later on. With a fresh account you should look for a high hype stats + lot of teamranked games, since you'll play a lot of inactive teams
That stat usually is the main factor, when looking for sponsors, beside team ranked elo. Without a PR you'll struggle to raise your team reputation.
If you miss on star elo, try the market for a cheap high elo player.
Though I gotta warn you. This is true for now, but with todays daily update at 16:00, UTC/server time, we'll get a small sponsor rework. So things might change.