I made a bit of a low level tanking guide with some tips. It’s not explicitly for AoE tanking, per say, and it depends a little on your preference: 2hander vs shield and 1hander.
I’m not sure how applicable it will be at higher levels, but so far I’ve tanked up to RFD without issue. Getting Ravager changed my “tanking” style quite a bit, in that I’m basically doing a DPS rotation, in addition to maintaining aggro on mobs, mostly with Demo Shout, Sunder Armor, and big damage, with a sparkling of Bladetorm procs.
One thing I would definitely recommend if you do not have it already is to use the addon Threat Plates (Classic). This is super helpful for determining when a mob might drop threat.
In addition to threat management, and cleave damage, managing Taunt and Mocking Blow, on “messy” pulls (e.g. accidentally face pull with no rage, instead of charge, or an over eager dps or pet pulls for you) can also be super helpful.