Amulet of strength
The Amulet of strength provides good offensive stats for melee and is an efficient item considering its stats and resources. However since it only provides a strength bonus for melee, it will only add to your melee maxhit. Your accuracy will remain unchanged.
The amulet of strength can be created by casting the magic spell lvl-3 Enchant from the normal spellbook on a ruby amulet. A ruby amulet can be bought in the jewellery shop or made by using the crafting skill.
To craft a ruby amulet, you first need a cut/uncut ruby, which can be bought from players. A cut ruby can also be purchased from the gem trader or obtained from stealing from a gem stall. The uncut ruby can be obtained through mining shooting stars, ores and gem rocks or be obtained from certain monsters as a drop.
To cut an uncut ruby a crafting level of 34 and a chisel are required. The cut ruby then has to be made into a ruby amulet at a furnace which requires lv 50 crafting, 1 gold bar and an amulet mould. Next you will need a ball of wool to attach to the ruby amulet, to make a (strung) ruby amulet. Finally, you have to enchant the (strung) ruby amulet by casting the magic spell lvl-3 Enchant on it, this requires lv 49 magic, 5 fire runes and 1 cosmic rune.