from maj you dont get 50% chance to resist a stun... it only adds 50% to your natural stunresist and if you have a low natural stunresist you'll still have a low one even with maj (slightly higher than before though). I don't know what DC or NM or Tallum light sets will give you so i wont suggest a set.... i'm just putting som perspective in it all :)
Restores 3% of melee damage inflicted on the enemy to oneself
DEX +1
CON -1
Light Majestic Set
Archery P. Atk. +8%
MP +240
Weight increased plus the point at which a weight penalty is applied +5759
Stun Resistance +50%
DEX +1
CON -1
Improved Apella Brigandine
Can be worn by a Baron or a higher-level Aristocrat. Produces following effect when worn with Improved Apella Helm, Improved Apella Leather Gloves and Improved Apella Boots: Maximum CP +1116, CP recovery speed is increased by 40%, and when the PC receives more than 50 damage, there is a 10% probability that evasion is increased by 2 and critical damage is decreased by 86. Increased Atk. Spd. by 2.5%.