Nasus Stacking

So, as playing quite a few games as Nasus, I've noticed something. You can stack on wards, spiderlings, turrets, and even Dragon/Baron. I had a game vs a top last night. He was average, easy to bait his barrels. I walked up to stack his barrel, low and behold, nothing happened. I would like to see some feedback from anyone whether he should be allowed or not to stack on barrels. It wouldn't be a game-breaking omfg op buff to . I would see it as more of just quality of life when a is literally taking 's true damage and arm pen every few seconds. Thanks for your time!