what is the best support gems when use reckoning ?

what is the best support gems when use reckoning, in 4 links?

the new trigger block gem, i am using now in 4 links;
reckoning, melee physical, weapon elemental dmg (becouse hatred) and life leech.

any suggestions?

In a 4L I run Reckoning, Riposte, Vengeance, and Life Gained On Hit, so every time I block, I gain at least 108 life. Usually gain more, cause reckoning hits multiple targets. Block counts as being Hit, even though your not taking damage, so with a 20Q Vengeance you have a 40% chance to proc from being Hit/Blocking, gaining a fair amount of health.

Reckoning/Vengeance are both AoE, so they're somewhat reliable when applying Curse on Hit and/or Blind, with the caveat being you need to get hit first. Life Leech is a good choice if your main attack isn't already capping leech (if it is, use LGoH as the above poster recommended). You can also set them up to generate charges via Power Charge on Crit or Endurance Charge on Melee Stun (you also get Frenzy charges if they kill stuff with Blood Rage up).