Armour Skills (Frost, Chaos, Fire, etc.)
magnetic aura absolutely rocks – sends projectiles back to the ‘sender’, especially funny when a large plains wurm throws a rock at you and it bounces back. If you can get it up before a highly damaging projectile hits, its just amazing (think wvw, when a glass-cannon ranger uses the multi-arrow skill over a few seconds. he can kill himself with that)
but yeah, the rest don’t seem to be making a big difference, but they do help a bit.