This is some of the potions I used to kill Diablo (I used 5 times as many)

you look like LEORIc xD btw you have so litle gold o.o

Potion money is hard to come by. I had a lot until I stocked up. I barely beat Diablo i had to keep getting potions later on because a full inventory wasnt enough. All summoning spells is not a wise skill point investment against all bosses. Baal was just awful.