That's an interesting combo but I don't think it's gold.
People love to hypothesize the Readied Sneak Attack + Second Sneak Attack combo, but it does cost the Rogue a very valuable Uncanny Dodge at the same time, which means you're staying in melee range but you're even squishier than a normal Rogue. At least with the Hasted combo you can Ready a ranged attack instead of a melee attack and still use your bonus action to Hide, but Berserker only gives you a bonus action melee attack.