Board Thread:New on Terraria Wiki/@comment-220.245.97.190-20130612082804/@comment-11126608-20130623011009

Molten Armour (full set)

Minishark (with 1000-2000 bullets)

Ironskin Potion

Regeneration Potion

And that's AFTER you've built a bridge that runs (preferably) from one side of hell to the other to ensure you have enough safe room to battle him on.

Mouth seems to take less damage than the eyes, so aim for those.