Magma Sword is a great sword for when you can get it--good damage, good for trolls.
It's also sold in the Warrior's Guild, so if you're a member of the Warrior's Guild, you might opt for the Breast Plate of the Forge as you can get the sword later.
The Breast Plate of the Forge has a decent fire resist which helps with a few fire areas. It's also an unique item.
The Ring of Health (+20 poison) can help with the spider and snake areas but there's comparable rings and resistances so unless you have no use for the first two, pass on the Ring.
The *future* wizard glass might get some use out of the Arcane Pendant but for now, it seems the least useful of the items.