i saw in the past few days alot of people saying give feral druid vanish or feign death
but the solution is so much simple here what i think
Cower Rank 6
20 Energy Melee Range
Instant 1 minute cooldown
Requires Cat Form
Cower, causing no damage but lowering your threat by 50%.
this should fix most of threat issues or if you prefer there is 2nd option
build in 30% threat reduction into one of the main feral talents