Focus

now please before we start i have played guild wars for several years but never really had no use for a focus untill today. today by luck i found a good focus i could get use out of but i have no idea what can be added to it and what would be best for it if you dont mind could someone please tell me?

EDIT: can plagueborn focuses not be upgraded or something?

Depends on what you want to use it for. wiki focus and it should give you a listing of what you can do to one

Plagueborn focuses cannot be upgraded in any way, but if it's good it can be worth a lot.

Focuses can have 2 mods on them - a Focus Core and an Inscription. Unfortunately, this only applies to focuses from Nightfall and EotN (and some special chests). Normally, a Focus from Factions or Prophecies (such as the Plagueborn) is not moddable. If it has an Inscription slot, it's moddable, otherwise it's not.

One of the common use for a wand+focus combo is the 40/40 set. HCT and HSR of primary attributes to 20/20 for wand and 20/20 for focus; combine together to equal 40/40.

Comes in very handy for fire Elementalist or Smiter running RoJ in VSF since they can have up to 3 RoJ on the skill bar at once and by the time they finish casting the 3rd RoJ, the other RoJs are ready to be cast again.