Signet of judement or shield of judgement?

which elite is better for a 55 monk ? signet of judgement ? or shield of judgement? i think both knockdown and deal dmg to target foe and all adjacent ones but i dont know which to get xD please help me ^^ thankyou!

Use Sheild, as far as i know Signet is useless for 55 farming

ok ^^ thankyou!

signet : 63 dmg ever 20 sec....

shield 53 every 2 sec...how can u even think of...