Abnormal Status Duration -2 Seconds

If i get a nebulite for abnormal status duration - 2 seconds and a line or 2 of it in unique or epic potential, will they stack to give me 4 or 6 seconds? I want to get 6 seconds on my top so I can be immune to the shorter duration statuses that I am not allowed to resist despite having over 100% status resistance. But if it doesn't stack . . . then i'd be looking to try multiple lines of invincibility after hit . . .which I am also unsure of whether or not those lines stack . . .

I believe there were some that stacked, some that didnt, and some that overall just simply didn't even work. I think it was @ShinkuDragon; That tested a few of these out? (Sorry if I'm completely off lol)

They stack, tested it a long time back. Shouldn't have changed

the last time i played (2 or 3 months ago?) invincibility still stacked.