It's not worth investing time into hard mode since it's just iron man mode on 10x exp. Only reason it's even an active game mode is because regular mode is shit & nobody has a reason to play it anymore. Palidino might as well have made iron man mode 10x exp & not bothered with "hard mode" because they're pretty much the same thing. Ultimate Iron man on the other hand is something entirely different.
Also still waiting on regular mode re-release/reset tho doubt it's gna happen any time soon.
edit: Might as well play OSRS if you like hard mode tbh, they're very similar.
I think it would be nice if the Jars just opened an interface that let players get a choice on the item they want. Jar's are already 10x the drop rate of every other item on the table, so if you've hit jar rate you should already have got all the other items the boss drops.