First I thought the easiest would be ants, though ‘highly’ venomous is debatable they more than make up for it in sheer quantity and ease of raising.
Which leads us to Myrmecia pyriformis aka the bull ant.
They attack by biting with powerful jaws, and then sting with their venom repeatedly. They are highly aggressive when their nest is disturbed as many Australian children discover.
First I thought the easiest would be ants, though ‘highly’ venomous is debatable they more than make up for it in sheer quantity and ease of raising.
Which leads us to Myrmecia pyriformis aka the bull ant.
They attack by biting with powerful jaws, and then sting with their venom repeatedly. They are highly aggressive when their nest is disturbed as many Australian children discover.
https://en.m.wikipedia.org/wiki/Myrmecia_pyriformis
I have been unable to locate information on the LD50 of their venom, as the only study on it seems to be paywalled.
On second thought it’s probably the Africanized Bee or killer bees, which won’t be as easy to raise safely in my opinion, but are much more dangerous.