Go make traps purify the curruption and keep seeds handy control the hollow and smash a couple demon alters check for curruption if any purify it go mine cobalt enough for a sword and full set of armor and have 80 extra do the same with mythrill then adamantite armor sword get greater healing pots get a repeater minishark or shotgun for ranged try to get cursed bullets or arrows get crystal storm or golden shower for magic for flail go for Dao of pow  I think you should get the flail shotgun and magic Baca use the cause lots of damage to him the flail is for when he is in a straight line the crystal storm is for close up attacking shotgun is for extra damage.