If you want the cheapest options:
https://wiki.project1999.com/Glowing_Stone_Band +
https://wiki.project1999.com/Globe_o...rburning_Flame .
Those are what I use on my tunnel mule. You get infravision and a greater light stone light source. They take up a Ring + Ranged slot, but those slots typically don't have exceptionally high stats in them until raid gear.
https://wiki.project1999.com/Eyepatch_of_the_Shadows is going to be a better upgrade for melee when you can afford it. That piece has good enough melee stats when compared to other pieces you can put there.
https://wiki.project1999.com/Crown_of_King_Tranix works too, as melee classes can always use +20 MR.