Knockdown skills

Hi all

I am currently using a lvl 20 Warrior/Elementalist and have recently descovered the effectiveness of 'Aftershock'. Aftershock deals additional damage to foes who are knocked down.

At the moment, I either use Gale (PvP - focusing on single foe) or Whirlwind (PvE - since enemies tend to gather around).

At the moment my point distrubtion is:

Air Magic 6
Earth Magic 9
Strength 9
Swordsmanship 11

The only reason I have a high amount of points in Air magic is because less than 5 (iirc) only gives gale a 50% chance of working. So does anyone know of any alternative skills which can knock down enemies which would be handy for my character? Or any alternative skills which do damage to adjacent foes which could be good?

Thanks in advance

whirlwind (for adjacent knockdown if attacking and no damage, use no/low air magic)
Lightning Surge/Mind Shock (air elites)
Meteor (fire)
Earthquake (earth)
Water trident (if moving foe-water elite)
Earthshaker/Backbreaker/devastating hammer(hammer elites)
hammer bash

P.S> use a hammer if you want KnockDown