Almost entering the Abyss

Being close to 100% base game and 2 expansions, I'm almost getting ready to enter the Abyss.
With the limited bank space (Hardcore character), I wonder what items I should keep.

I have so many items in my bank (650/693) at the moment, surely most of them can be sold but I have no idea what.

I was thinking about only keeping:

• Food

• Summoning tablets

• Potions

• Endgame gear for Melee, Ranged and Magic

But is there anything else I should really keep?