You used to be able to knockdown enemies while they were in the stand back up animation, now they tend to be able to get up and attack once before being able to be knocked back down. It's still a lot of protection.
To knock anything down you need to overcome their knockback protection. With AV's you won't be able to do that with Air Sup.
Poisonous Ice 50 Ice/Rad
Icy Jax 50 Ice/SS
Jaxon Penn 50 Shield/Mace
Cpt Clax 50 Thugs/Dark
Lady BlackIce 50 Dark/Cold
Lady Black Ice 50 Dark/Ice
Bella Jax 50 Storm/Sonic
Operative Jax 50 SoA
Level 50 Trick Arrow Alts
TA/A-Plant/TA-Bots/TA
Level 50 Claws Scrappers
SR-Regen-DA-Invul-WP-FA
Air Sup is still an awesome power for just about anyone (my controllers use it for damage-dealing AND extra mitigation). Only time I DON'T use it is if the character should not be in melee and needs to hover (perching blasters) or if the character has a weapon (katana, claws) that would have to be re-drawn after using Air Sup.
AVs are essentially immune to knock* effects, but they can be vulnerable for very small windows of time. For AVs that have a small vulnerability you can knock them for ~2s out of every 75s. Other AVs are, as far as I can tell, completely immune.
In other words - it's neat when it happens, but don't plan on being able to do it with any degree of reliability.
this is a melee power from the flight pool power set
i heard it can keep your target down perma with enuff recharge
can it knock down avs for certain everytime?