to upgrade or not to upgrade?

i have a sword thats
14% always -10 armor while attack
20/20
+5 armor
should i upgrade the +5 armor to 30 hp or keep it so its only -5 armor while attacking?

None of the above? In my opinion, use a different sword....
You already take more damage while attacking with this weapon; "upgrading" it by stripping the defense mod in favor of health is a mistake. More health is only useful when you drop to 1 hp, anyway.

Well, i would get rid of the sundering mod for a vamp mod and keep the +5AL.

If you can salvage the 20/20 do it and get either a 15^50 or a -5 +15 unless that sword has a nice skin... If it is a rare skin, just leave it.

I personaly would only put alot of work into a item if it is a rare skin, req 7-8 (if ur picky), and a perfect dmg mod.

the sword is 14% so not 15%
it lowers armour while attacking which, in 90% (estimated) of all cases is not what you'd want.
A gladiator armoured warrior will effectively get assassin armour vs everything except physical damage... for example.

A perfect 15% or even 15^50 sword can be obtained from crafters and collectors or can even be bought from players with the money you would make from the sundering upgrade... if you were lucky enough to salvage it.

I would personally expert salvage it and hop for the sundering but you're not me.