A question on Devices and Inventions

I was curious if anyone knew if cloaking device from the /devices pool and one of the passive stealth IOs for flight/running/jumping stacked with one another?

They do. Combined they give enough stealth to cover you against most NPCS although against some enemies with boosted perception (such as Rikti drones) you'll need a smoke grenade as well.

I see, thank you.