Regarding proxies. There is general information on the forum
How can I improve public proxy effectiveness? https://rootjazz.com/forum /viewtopic.php?f=11&t=1213
Do I need to use proxies?
No. If you don't use your account on your phone with a proxy, then you don't need one. Proxies allow you to run multiple accounts and hide the fact you control them from a single machine
How many accounts can I run on a proxy?
There is no definite answer here. Well there is, and that answer is "it depends". If you are using your accounts slowly and safely you can load more accounts on to a proxy than if you are hammering away and spamming everyone. Remember, if you get an account banned, all accounts that use that proxy are likely to also get banned. So the answer, use as many accounts on a proxy that you are prepared to lose in case of a ban.