Shared proxy with tumblr

How many accounts can I use with the same proxy? Is shared proxies can do the job?
I tried to get some proxies from different providers but it seems it doesn't work well or very slow, please let me know what the fastest shared proxies providers here for tumblr

most people will say 1-2 accounts with a proxy , ide use dedicated/ private proxies.
shared proxies prob not the best idea.

Hello. I don't risk running more than 2-3 on one proxy which those can still go down on a chain ban.

1-2 accs private proxies, bro

Shared accounts can do the job if they are clean (spam free). Also, you need to make sure that the other guys you are sharing the proxies aren't using them for tumblr as well. You can check buyproxies.org. Their support will assist you if you need it.
However, if you are planning to heavily use tumblr with tons of actions each day and tons of account, go with private proxies.