Save it for some random 5* speed set item that you upgraded to 16 way back when, and hope for a nice triple roll on speed substat?

I get rare books on top of rare books as rewards.  I have around 180 of them.   Is this wrong?

I am eagerly awaiting a system that lets us roll books up :/ Got about 120 of them myself. Also, I just burn epic books randomly during CvC for points, since they're also pretty much useless to me.

I was gonna say, has no one ever had a really nice piece early with one flat on it and speed sub, rolled it 3-4x, left the room and come back to pure trash?

The only 5* items I have in common use are speed boots, which are not a good target for Chaos Ore as they will in all probability no longer be speed boots after they're reworked.

So 5* ore is kind of a crummy reward for getting all the way through the milestones on an event.  That said, if you don't actually use 5* gear, you can "roll the dice" and rework a piece knowing that you won't be that disappointed if it ends up being a total botch.

Maybe use on stoneskin?

Stoneskin or on weapon, helmet or shield, never on gauntlets, chest or boots

Probably got lucky but both chaos ores i used so far on a triple flat stat on a speed helm and weapon rolled speed. That is what i use em for but if you just have 6 star gear on your account yeah that reward is a little underwhelming...

Right now when i used to bin double flat roll if you get a double flat roll on speed on an epic / legendary item always go for the triple roll cause you might just hit speed... its a 1 in 8 to 1 in 10 chance i think...

Idk. Its a crapshoot either way, but if u get a lego chest/gaunt for stoneskin with crap stats might be better off with high risk / high reward. 

But I guess it's moot, for me at least, as these aren't likely f2p friendly resources.