Two ideas that might be old and already covered.

1. Make it so you can carry a max amount of every kind of abs-wand/staff. Perhaps three or so, this will result in that not one char is used as a storage char with 10 of the same wand, totally covering a wand spot.

2. Make it so non_limited potions do not evaporate. Probably wont happen I guess, but it would remove an annoyance that add little to the game in my opinion. Might not be worth doing code wise or gameplay wise for you though.