Just buy HUGE amonts of burial sentences and Insane hotdogs (Like at least 250 or 300 of each) and make sure you have the most defense you can have. Offense doesn't matter. Keep using burial sentences until you get low on health (low meaning like 7000) and then use an insane hotdog. He will use one too. make sure you never get too low on health and just keep using those burial sentences until Hellram is dead. Make sure you DO NOT attack because you will do 1 damage and he will spam a whole bunch of really cheap spells and items and then one-hit KO you.