Full version of How to Melee while cloaked:
When you’re in the waiting screen as predator, waiting with the other fireteam, go to your options menu and do the following as you see in the video. After each Delete, or Set action, press the Save Button. What this does is clear out the initial set of fire, reprogram in cloak to initialize, then you reset back in fire weapon. This allows your cloak to sync with your actions better. At least for single, light attacks.
(You may have to predefine your keybinds to what is seen in the video)
Afterwards, you should be able to do single attacks as melee while invisible. This lasts for as long as you haven’t closed the game, I believe. You don’t have to do this every match to stay cloaked while you attack the fireteam. You can use knife attacks, shock gauntlets, the hook all while being cloaked. Try out many of your own favorite weapons! Report back on what new moves you find.

