Wcsherry made the ogre bandits harder, but prior to that someone had made it so they drop only one potion.
They were a well balanced spawn with that drop of only one potion, and I'm pointing this out because with those fixes overlapping they are now rather brokenly hard.
Either they should be this hard, and drop lots of potions like before, or they should be their former selves and drop the one potion they were already fixed to drop - I assume one fix was made without awareness of the other having been made.