True email sending interval randomization (per email sending address, not per campaign!)

My goal is to send bulk email in a fashion that appears as natural and "non-bulk" as possible to avoid the wrath of Google! In this hypothetical example I want to send 480 emails in total, per every 9am-5pm, 8 hour day, M-F using 20 sending email addresses. That means each email address would send 24 emails per day, 3 per hour. I want the emails randomized +/- 5 minutes for EACH email address (not "randomizing" an entire 20 email sending address "batch" as Instantly currently does, but having the randomization applied to each sending email address independently of the others.)

In this example, having 20 emails individually randomized over a 10 minute window (the +/- 5 minute window) would look totally natural (unlike sending a batch of 20 emails all at once as a "randomized" batch as is currently done.)

Also, to fire up a giant batch of 20 emails every day at the instant the schedule starts doesn't look natural. Each first email sent from each sending email address should also follow that random send interval, as well. (I mean, come on, what company has 20 employees show up at 9am (yeah, that happens… HA!) and then immediately all 20 employees INSTANTLY send their first email?)

Having each email "sender" start their sending day at 9am +/- 5 minutes and do the same for the end of their sending day 5pm +/- 5 minutes (again, an example) would look far more natural.

These two true randomizations would mean no email ADDRESS in a campaign that has the "randomization" interval toggled should ever have another email sent from another email address in that same campaign at the exact same moment. Now that's natural.

I LOVE Instantly and my goal is to be able to use it for as long as possible, as easily and trouble-free as possible and flying under the Google/Gmail radar by doing true randomization at the email sending address level (not a giant batch/campaign level) really makes sense.