10 accs on the same phone (device ID, IP, that sort of thing) is gonna get you flagged fast on all those accounts.
Depending on the setup, you'd want to stick to 3 or 5 active accounts on one device. Better if you could use proxies or different IPs for each account. You also want to avoid cross engagements between the account or just having the accounts interact with each other.
If you're monetizing or growing accounts seriously, consider using an Android emulator (with the right setup), anti-detect browsers, or different phones. If you can, of course.