What is your outreach strategy (high customization, mass cust., mass email)

I have been meeting people at different end of the spectrum. I know some searchers send 300 highly customized emails per month, some sends ~redactedrelatively customized emails per month and some just doesnt customize at all and send same sequence to masses.

What is your strategy and how is it working?

Right now I am trying mass customization, I dont think I will ever try first one - highly customized low volume but I am considering trying mass emailing a bit but I also dont want to waste high quality leads.

Please let me know what you think